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Lennox S40 Facts: 147 Specifications & 111 Highlights

Before adding any thermostats to cart, see why the Lennox S40 stands out with 147 specs & features — including buyer-favorite features like general information, physical & installation, display & controls & connectivity & smart features.

Supermod

Putri N. H.

777 Products

Moderator

Ayunda I. H.

2300 Products

72 Points

Lennox

Lennox S40

Highlights ¹¹¹

No extras. Just what matters.

Why is Lennox S40 better than other thermostats ?

General Information Physical & Installation Display & Controls Connectivity & Smart Features Sensors & Monitoring Scheduling & Automation HVAC Compatibility Power & Electrical Safety, Compliance & Reliability

General Information

User Interface Type: Touchscreen Describes the primary interface design.
Product Type: Thermostat Defines the core product classification.
Smart Thermostat Indicates whether the thermostat has smart connectivity features. with a difference of 81.0 points
Learns Usage Patterns Automatically Shows whether the device adapts automatically to user behavior. with a difference of 83.0 points
Full Control via Mobile App Confirms whether the thermostat can be controlled via mobile app. with a difference of 81.0 points
Made in US Indicates the country where the thermostat is manufactured or assembled.
Released in 2023 Indicates the year the thermostat model was officially released to the market.
Thermostat Category: Smart Indicates the functional category of the thermostat.
Control Method: Touch,App,Voice Explains how users interact with the thermostat.
Language Support: English Lists supported display or app languages.
Available in Black Color Indicates the exterior color of the thermostat for visual and aesthetic matching.
Designed for Residential Use Specifies the primary usage environment.
Suitable for Indoor Environments Describes where the thermostat is designed to be installed.
Supports Voice Assistant Indicates compatibility with voice assistants. with a difference of 81.0 points

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Physical & Installation

1.11 inch shorter height Indicates the vertical size of the thermostat. 3.0 inch vs 4.1 inch
Includes Wall Plate Indicates whether a wall plate is included. with a difference of 80.0 points
Wiring Requirement: C-Wire,Low Voltage Specifies the wiring configuration required for proper installation.
Installation Difficulty Level: Difficult Rates how complex installation is.
Wall Compatibility: Drywall,Plaster Specifies supported wall materials.
Tamper Resistant Design Indicates resistance to unauthorized adjustment. with a difference of 83.0 points
Mounting Type: Wall-Mounted Specifies how the thermostat is mounted.
Installation Orientation: Portrait Defines allowed mounting orientation.
Supports Trim Plates Shows if trim plates can be added for coverage. with a difference of 80.0 points
Works Well With Surface Mounting Indicates surface mount compatibility. with a difference of 80.0 points
Includes Installation Accessories Confirms inclusion of mounting hardware. with a difference of 80.0 points

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Display & Controls

2.26 inch larger display size Indicates the diagonal size of the display. 7.0 inch vs 4.7 inch
Provides Backlight Display Indicates if the display is backlit. with a difference of 80.0 points
Display Orientation: Portrait Defines how the screen is oriented.
Supports Accessibility Features Like High-Contrast Improves usability for accessibility needs.
Responsive Touchscreen Control Available Shows whether touch input is supported. with a difference of 80.0 points
Features Adjustable Brightness Allows users to change screen brightness. with a difference of 80.0 points
Color Display Indicates support for multiple colors on screen. with a difference of 80.0 points
Offers Proximity Activation Activates the screen when someone approaches. with a difference of 81.0 points
Display Customization Available Allows users to customize on-screen info. with a difference of 80.0 points
Supports Control Lock Prevents unauthorized setting changes. with a difference of 80.0 points
Features Child Lock Prevents accidental changes by children. with a difference of 80.0 points
Display Type: LCD Defines the underlying display technology.
Always-On Display Available Shows key info without waking the device. with a difference of 81.0 points

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Connectivity & Smart Features

Supports Wi-Fi Connectivity Indicates whether the thermostat can connect to a Wi-Fi network for smart features and remote control. with a difference of 80.0 points
Wi-Fi Band: 2.4GHz Specifies supported Wi-Fi frequency bands.
Works With Alexa,Google Home Ecosystems Lists supported smart home platforms.
Firmware Update Method: OTA Describes how firmware updates are applied.
Supports Cloud Connectivity Shows whether cloud services are used. with a difference of 81.0 points
Local Control Available Indicates whether local control works without internet. with a difference of 80.0 points
Supports Remote Access Allows control from outside the home. with a difference of 81.0 points
Data Encryption Available Protects transmitted user data. with a difference of 81.0 points
Supports Multiple User Profiles Allows multiple users to access controls. with a difference of 81.0 points
Supports Geofencing Adjusts settings based on user location. with a difference of 81.0 points

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Sensors & Monitoring

Temperature Sensor Type: Digital Defines the technology used to measure temperature.
Temperature Range: 45-99°F Indicates supported temperature measurement range.
Humidity Range: 0-100% Shows supported humidity measurement range.
Provides Humidity Sensor Indicates whether humidity is measured. with a difference of 80.0 points
Occupancy Detection Available Determines if people are present in the space. with a difference of 82.0 points
Features Ambient Light Sensor Adjusts display or behavior based on light. with a difference of 81.0 points
Includes Proximity Sensor Detects nearby presence for wake-up actions. with a difference of 81.0 points
Supports Outdoor Temperature Allows use of outdoor temperature data. with a difference of 81.0 points
Remote Sensor Available Indicates compatibility with external sensors. with a difference of 80.0 points
Sensor Accuracy: High Indicates how accurately the thermostat sensors measure conditions.
Sensor Calibration Available Allows manual or automatic sensor adjustment. with a difference of 80.0 points
Offers Real-Time Monitoring Provides live environmental data. with a difference of 80.0 points
Offers Historical Data Tracking Stores past environmental data. with a difference of 81.0 points
Energy Usage Monitoring Available Tracks HVAC energy usage estimates. with a difference of 81.0 points
Provides System Health Monitoring Monitors HVAC system performance and alerts. with a difference of 81.0 points

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Scheduling & Automation

Supports Scheduling Indicates whether scheduling is supported. with a difference of 80.0 points
Scheduling Type: Automatic Defines how schedules are created and managed.
Supports Daily Scheduling Allows temperature changes by day. with a difference of 80.0 points
Offers Weekly Scheduling Allows different schedules across the week. with a difference of 80.0 points
Adaptive Scheduling Available Adjusts schedules based on behavior. with a difference of 81.0 points
Supports Learning Schedule Learns user habits over time. with a difference of 83.0 points
Vacation Mode Available Maintains efficiency when away for long periods. with a difference of 80.0 points
Supports Away Mode Adjusts settings when occupants leave. with a difference of 80.0 points
Provides Sleep Mode Optimizes temperature for sleeping hours. with a difference of 80.0 points
Features Eco Mode Reduces energy use automatically. with a difference of 81.0 points
Temperature Presets Available Allows quick switching between preset temps. with a difference of 80.0 points
Provides Automation Rules Enables rule-based automation logic. with a difference of 81.0 points
Supports Time-Based Triggers Executes actions at set times. with a difference of 80.0 points
Event-Based Triggers Available Responds to events like occupancy changes. with a difference of 81.0 points
Uses Weather-Based Automation Adjusts based on weather conditions. with a difference of 81.0 points
Supports Demand Response Participates in utility demand programs. with a difference of 81.0 points
Compatible with Utility Program Works with energy provider programs. with a difference of 81.0 points

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HVAC Compatibility

HVAC System Type: Central,Split Defines the general HVAC system types supported.
Heating System Compatibility: Furnace,Heat Pump Indicates supported heating system types.
Cooling System Compatibility: Central AC,Heat Pump Indicates supported cooling system types.
Fully Compatible With Heat Pumps Indicates support for heat pump systems. with a difference of 80.0 points
Supports Dual Fuel Systems Supports dual-fuel HVAC configurations. with a difference of 81.0 points
Supports Multi-Stage Heating Indicates support for multi-stage heating. with a difference of 80.0 points
Supports Multi-Stage Cooling Indicates support for multi-stage cooling. with a difference of 80.0 points
Fan Control Available Allows independent fan operation control. with a difference of 80.0 points
Supports Humidifier Supports integrated humidifier control. with a difference of 81.0 points
Supports Dehumidifier Supports integrated dehumidifier control. with a difference of 81.0 points
Supports Ventilator Supports ventilation systems like HRV/ERV. with a difference of 81.0 points
Supports Gas Furnace Indicates support for gas furnaces. with a difference of 80.0 points
Supports Oil Furnace Indicates support for oil furnaces. with a difference of 80.0 points
Supports Low Voltage Systems Specifies supported control voltages.
Supports Zone Control Allows control of HVAC zones. with a difference of 81.0 points

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Power & Electrical

Power Source: Hardwired Indicates how the thermostat receives power.
0.22 Hz broader frequency compatibility Indicates supported electrical frequency. 60.0 Hz vs 59.8 Hz
Power Failure Recovery Available Restores settings after outages. with a difference of 80.0 points
Energy Star Certified Indicates energy efficiency certification. with a difference of 81.0 points

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Safety, Compliance & Reliability

Electrical Safety Certification: UL Lists electrical safety certifications.
Operating Temperature Range: 32-120 °F Defines the ambient temperature range for safe operation.
Operating Humidity Range: 5-95% Specifies allowable humidity levels during operation.
Storage Temperature Range: -20-140°F Indicates safe temperature range when not in use.
Has 5 years Warranty Indicates duration of warranty coverage.
Regulatory Compliance: FCC Indicates compliance with regulations.
EMC Compliant Indicates electromagnetic compatibility compliance. with a difference of 80.0 points
Supports Fail-Safe Mode Ensures safe behavior during failure. with a difference of 80.0 points
Provides System Alerts Notifies users of system issues. with a difference of 80.0 points
Provides Maintenance Alerts Reminds users of maintenance needs. with a difference of 80.0 points
Diagnostic Tools Available Provides tools for troubleshooting. with a difference of 81.0 points
0.11 years longer lifespan Estimates usable product lifespan. 10.0 years vs 9.9 years

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Quick Take

The essentials that matter—nothing extra

A fast snapshot of the Lennox S40, covering its standout specification and what you can expect right out of the box.

Lennox S40

Lennox S40 Smart Thermostat is a high-end, 7-inch HD touchscreen "command center" that manages heating, cooling, and air quality for a fully integrated Lennox HVAC system. It employs smart features such as Schedule IQ and Smart Away geofencing to automatically adjust to your routine for energy savings, while also offering real-time air quality monitoring and remote diagnostics to your dealer.

Specifications & Facts ¹⁴⁷

Specs measured. Drama avoided.

The Lennox S40 thermostats is more than a price tag. Explore specs, real pros and cons, and see how it holds up next to similar thermostats — then add your own vote!

General Information ¹⁶

Lennox S40 User Interface Type

What type of user interface does it have?

98 Lennox S40 0 Votes Touchscreen

8 Thermostats in this range Button-Based

Lennox S40

User interface type is a touchscreen, enhancing ease of use and navigation.

Describes the primary interface design.

Lennox S40 Product Type

What type of product is this?

18 Lennox S40 0 Votes Thermostat

1 Thermostats in this range Thermostat

Lennox S40

This product is categorized as a thermostat, designed to regulate indoor temperature.

Defines the core product classification.

Lennox S40 Smart Thermostat

Is this a smart thermostat?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

This is a smart thermostat, meaning it incorporates connectivity and automation features for enhanced control.

Indicates whether the thermostat has smart connectivity features.

Lennox S40 Learning Capability

Does it learn your temperature preferences?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

This thermostat has a learning capability that adapts to user behavior and preferences for optimized comfort and energy efficiency.

Shows whether the device adapts automatically to user behavior.

Lennox S40 Mobile App

Can it be controlled using a mobile app?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Mobile app access is available for remote control and monitoring of the thermostat.

Confirms whether the thermostat can be controlled via mobile app.

Lennox S40 Country of Manufacture

Where is this thermostat manufactured?

78 Lennox S40 0 Votes US

6 Thermostats in this range US

Indicates the country where the thermostat is manufactured or assembled.

Lennox S40 Release Year

What year was this thermostat released?

88 Lennox S40 0 Votes 2023

3 Thermostats in this range 2017

Indicates the year the thermostat model was officially released to the market.

Lennox S40 Thermostat Category

What category of thermostat is this?

98 Lennox S40 0 Votes Smart

8 Thermostats in this range Non-Programmable

Indicates the functional category of the thermostat.

Lennox S40 Control Method

How do you control this thermostat?

88 Lennox S40 0 Votes Touch, App, Voice

7 Thermostats in this range Buttons

Explains how users interact with the thermostat.

Lennox S40 Language Support

What languages are supported?

98 Lennox S40 0 Votes English

7 Thermostats in this range English

Lists supported display or app languages.

Lennox S40 Color

What color is the thermostat?

38 Lennox S40 0 Votes Black

3 Thermostats in this range White

Indicates the exterior color of the thermostat for visual and aesthetic matching.

Lennox S40 Intended Use

What is the intended use of this thermostat?

38 Lennox S40 0 Votes Residential

3 Thermostats in this range Residential

Specifies the primary usage environment.

Lennox S40 Installation Location

Where can this thermostat be installed?

48 Lennox S40 0 Votes Indoor

4 Thermostats in this range Indoor

Describes where the thermostat is designed to be installed.

Lennox S40 Voice Assistant

Does it support voice assistants?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates compatibility with voice assistants.

Lennox S40 Replaceable Faceplate

Is the faceplate replaceable?

No 0 Votes ~~Lennox S40~~

Thermostats in this range Who knows? (Help us out by suggesting one!)

Indicates whether the front plate can be swapped.

Lennox S40 Modular Design

Does it have a modular design?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Shows whether components can be upgraded or replaced.

Physical & Installation ¹⁷

Lennox S40 Width

What is the width of the thermostat?

11.61 inch 0 Votes

4.69 inch (Average)

Lennox S40

The width measures 11.61 inch (29.5 cm), providing ample space for display and controls while remaining suitable for wall mounting.

Indicates the horizontal size of the thermostat.

Lennox S40 Depth

What is the depth of the thermostat?

10.51 inch 0 Votes

1.75 inch (Average)

Lennox S40

The thermostat has a depth of 10.51 inch (26.7 cm), making it relatively compact for wall-mounted installation.

Measures how far the thermostat protrudes from the wall.

Lennox S40 Height

What is the height of the thermostat?

3.03 inch 0 Votes

4.14 inch (Average)

Lennox S40

The height of the thermostat is 3.03 inch (7.7 cm), making it suitably sized for wall mounting without dominating space.

Indicates the vertical size of the thermostat.

Lennox S40 Weight

How much does the thermostat weigh?

1.65 lbs 0 Votes

0.82 lbs (Average)

Lennox S40

The thermostat weighs 1.65 lbs (0.75 kg). This lightweight design facilitates easy installation and handling.

Shows how heavy the thermostat unit is.

Lennox S40 Wall Plate

Is a wall plate included?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

A wall plate is included or supported, assisting with neat installation and coverage of wall marks.

Indicates whether a wall plate is included.

Lennox S40 Wiring Requirement

What wiring is required for this thermostat?

68 Lennox S40 0 Votes C-Wire, Low Voltage

6 Thermostats in this range C-Wire, Low Voltage

Lennox S40

The wiring requirement includes C-Wire and low voltage connections, common in modern HVAC systems for continuous power supply.

Specifies the wiring configuration required for proper installation.

Lennox S40 Professional Installation Recommended

Is professional installation recommended?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Professional installation is recommended to ensure proper setup, safety, and performance.

Advises whether expert installation is suggested.

Lennox S40 Installation Difficulty Level

How difficult is installation?

98 Lennox S40 0 Votes Difficult

3 Thermostats in this range Easy

Lennox S40

Installation difficulty is rated difficult, indicating it is best suited for experienced installers or professionals.

Rates how complex installation is.

Lennox S40 Wall Compatibility

What wall types are compatible?

48 Lennox S40 0 Votes Drywall, Plaster

4 Thermostats in this range Drywall, Plaster

Lennox S40

Wall compatibility includes drywall and plaster surfaces, the most common interior wall materials for home installations.

Specifies supported wall materials.

Lennox S40 Tamper Resistant Design

Is it tamper resistant?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

The thermostat includes a tamper resistant design. This feature helps prevent unauthorized changes, making it suitable for environments where security is important.

Indicates resistance to unauthorized adjustment.

Lennox S40 Mounting Type

How is the thermostat mounted?

48 Lennox S40 0 Votes Wall-Mounted

4 Thermostats in this range Wall-Mounted

Specifies how the thermostat is mounted.

Lennox S40 Installation Orientation

What orientation can it be installed in?

48 Lennox S40 0 Votes Portrait

4 Thermostats in this range Portrait

Defines allowed mounting orientation.

Lennox S40 Trim Plate Compatibility

Is it compatible with trim plates?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Shows if trim plates can be added for coverage.

Lennox S40 Recessed Mount

Does it support recessed mounting?

No 0 Votes ~~Lennox S40~~

Thermostats in this range Who knows? (Help us out by suggesting one!)

Indicates recessed mounting capability.

Lennox S40 Surface Mount

Does it support surface mounting?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates surface mount compatibility.

Lennox S40 Detachable Unit

Is the unit detachable?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Shows if the unit can be detached from base.

Lennox S40 Installation Accessories

Are installation accessories included?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Confirms inclusion of mounting hardware.

Display & Controls ¹⁸

Lennox S40 Display Size

How large is the display?

7 inch 0 Votes

4.74 inch (Average)

Lennox S40

The display size is 7 inch (17.8 cm), providing clear visibility and user interaction.

Indicates the diagonal size of the display.

Lennox S40 Backlight

Is the display backlit?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

The thermostat includes a backlight, which improves screen visibility in low light.

Indicates if the display is backlit.

Lennox S40 Screen Resolution

What is the screen resolution quality?

58 Lennox S40 0 Votes High

3 Thermostats in this range Standard

Lennox S40

The screen resolution is high, providing crisp and clear display quality.

Describes the visual clarity and sharpness of the display.

Lennox S40 Display Orientation

What is the display orientation?

48 Lennox S40 0 Votes Portrait

4 Thermostats in this range Portrait

Lennox S40

Display orientation is portrait, ideal for wall-mounted thermostats to maximize screen usability.

Defines how the screen is oriented.

Lennox S40 Accessibility Features

What accessibility features are included?

68 Lennox S40 0 Votes High-Contrast

5 Thermostats in this range Large-Text

Lennox S40

Accessibility features include high-contrast options to assist users with visual impairments.

Improves usability for accessibility needs.

Lennox S40 Touchscreen

Does it have a touchscreen?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

A touchscreen interface enables intuitive and responsive user interactions.

Shows whether touch input is supported.

Lennox S40 Adjustable Brightness

Can you adjust the brightness?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Adjustable brightness helps improve readability in different lighting environments and user preferences.

Allows users to change screen brightness.

Lennox S40 Color Display

Is it a color display?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

The device features a color display, enhancing visibility and user interface appeal.

Indicates support for multiple colors on screen.

Lennox S40 Proximity Activation

Does the display activate by proximity?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Proximity activation enables the thermostat to detect when a user is near and activate the display or functions accordingly.

Activates the screen when someone approaches.

Lennox S40 Display Customization

Can the display be customized?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Display customization options enable users to personalize screen appearance to their preferences.

Allows users to customize on-screen info.

Lennox S40 Control Lock

Is there a control lock feature?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Control lock is available, enabling users to lock settings to prevent unintended adjustments.

Prevents unauthorized setting changes.

Lennox S40 Child Lock

Does it have a child lock?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Child lock prevents young children from changing thermostat settings, ensuring safety and stability.

Prevents accidental changes by children.

Lennox S40 Display Type

What type of display does it use?

38 Lennox S40 0 Votes LCD

3 Thermostats in this range LCD

Defines the underlying display technology.

Lennox S40 Always-On Display

Is the display always on?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Shows key info without waking the device.

Lennox S40 Physical Buttons

Does it have physical buttons?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates presence of tactile buttons.

Lennox S40 Dial Control

Does it use a control dial?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates use of a rotating dial.

Lennox S40 Gesture Control

Does it support gesture control?

No 0 Votes ~~Lennox S40~~

Thermostats in this range Who knows? (Help us out by suggesting one!)

Allows gesture-based interaction.

Lennox S40 Status Indicator Lights

Are there status indicator lights?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Uses lights to show system status.

Connectivity & Smart Features ¹⁷

Lennox S40 Wi-Fi Connectivity

Does the thermostat support Wi-Fi connectivity?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Lennox S40

Wi-Fi connectivity enables remote control and monitoring through wireless networks.

Indicates whether the thermostat can connect to a Wi-Fi network for smart features and remote control.

Lennox S40 Wi-Fi Band

Which Wi-Fi bands are supported?

38 Lennox S40 0 Votes 2.4GHz

4 Thermostats in this range 2.4GHz

Lennox S40

The Wi-Fi band supported is 2.4 GHz, which offers good range and compatibility with most home networks.

Specifies supported Wi-Fi frequency bands.

Lennox S40 Smart Home Ecosystem Compatibility

Which smart home ecosystems are supported?

80 Lennox S40 0 Votes Alexa, Google Home

7 Thermostats in this range Alexa, Google Home, Apple HomeKit

Lennox S40

The smart home ecosystem compatibility includes Amazon Alexa and Google Home, facilitating voice control and integration.

Lists supported smart home platforms.

Lennox S40 Bluetooth Connectivity

Does it support Bluetooth?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Shows whether Bluetooth connectivity is available.

Lennox S40 Firmware Update Method

How are firmware updates performed?

87 Lennox S40 0 Votes OTA

7 Thermostats in this range OTA

Describes how firmware updates are applied.

Lennox S40 Zigbee

Does it support Zigbee?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates compatibility with Zigbee networks.

Lennox S40 Z-Wave

Does it support Z-Wave?

No 0 Votes ~~Lennox S40~~

Thermostats in this range Who knows? (Help us out by suggesting one!)

Indicates compatibility with Z-Wave systems.

Lennox S40 Thread

Does it support Thread?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates support for the Thread protocol.

Lennox S40 Cloud Connectivity

Does it connect to the cloud?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Shows whether cloud services are used.

Lennox S40 Local Control Capability

Can it be controlled locally without internet?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates whether local control works without internet.

Lennox S40 API Access

Is API access available?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates availability of developer APIs.

Lennox S40 Remote Access

Can it be accessed remotely?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows control from outside the home.

Lennox S40 Data Encryption

Is data encrypted?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Protects transmitted user data.

Lennox S40 User Account Required

Is a user account required?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates if an online account is mandatory.

Lennox S40 Multi-User

Can multiple users access it?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows multiple users to access controls.

Lennox S40 Geofencing

Does it support geofencing?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Adjusts settings based on user location.

Lennox S40 IFTTT

Is IFTTT supported?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Enables automation with third-party services.

Sensors & Monitoring ¹⁷

Lennox S40 Temperature Sensor Type

What type of temperature sensor is used?

88 Lennox S40 0 Votes Digital

7 Thermostats in this range Thermistor

Defines the technology used to measure temperature.

Lennox S40 Temperature Range

What temperature range is supported?

38 Lennox S40 0 Votes 45-99°F

2 Thermostats in this range 40-90°F

Indicates supported temperature measurement range.

Lennox S40 Humidity Range

What humidity range is supported?

98 Lennox S40 0 Votes 0-100%

5 Thermostats in this range 5-90%

Shows supported humidity measurement range.

Lennox S40 Humidity Sensor

Does it measure humidity?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates whether humidity is measured.

Lennox S40 Motion Sensor

Does it have a motion sensor?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Detects movement near the thermostat.

Lennox S40 Occupancy Detection

Can it detect room occupancy?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Determines if people are present in the space.

Lennox S40 Ambient Light Sensor

Does it detect ambient light?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Adjusts display or behavior based on light.

Lennox S40 Proximity Sensor

Does it have a proximity sensor?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Detects nearby presence for wake-up actions.

Lennox S40 Outdoor Temperature

Does it support outdoor temperature data?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows use of outdoor temperature data.

Lennox S40 Remote Sensor

Can it use remote sensors?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates compatibility with external sensors.

Lennox S40 Sensor Accuracy

How accurate are the sensors?

68 Lennox S40 0 Votes High

5 Thermostats in this range Standard

Indicates how accurately the thermostat sensors measure conditions.

Lennox S40 Sensor Calibration

Can the sensors be calibrated?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows manual or automatic sensor adjustment.

Lennox S40 Sampling Rate

How often does the thermostat sample data?

88 Lennox S40 0 Votes Real-Time

4 Thermostats in this range Standard

Describes how frequently the thermostat sensors collect and update environmental data.

Lennox S40 Real-Time Monitoring

Does it offer real-time monitoring?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Provides live environmental data.

Lennox S40 Historical Data Tracking

Can it track historical data?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Stores past environmental data.

Lennox S40 Energy Usage Monitoring

Does it monitor energy usage?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Tracks HVAC energy usage estimates.

Lennox S40 System Health Monitoring

Does it monitor system health?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Monitors HVAC system performance and alerts.

Scheduling & Automation ¹⁸

Lennox S40 Scheduling Capability

Does it support scheduling?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates whether scheduling is supported.

Lennox S40 Scheduling Type

What type of scheduling is available?

78 Lennox S40 0 Votes Automatic

3 Thermostats in this range Manual

Defines how schedules are created and managed.

Lennox S40 Daily Scheduling

Can you set daily schedules?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows temperature changes by day.

Lennox S40 Weekly Scheduling

Can you set weekly schedules?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows different schedules across the week.

Lennox S40 Adaptive Scheduling

Does it adapt schedules automatically?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Adjusts schedules based on behavior.

Lennox S40 Learning Schedule

Does it learn your schedule?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Learns user habits over time.

Lennox S40 Vacation Mode

Is there a vacation mode?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Maintains efficiency when away for long periods.

Lennox S40 Away Mode

Does it support away mode?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Adjusts settings when occupants leave.

Lennox S40 Sleep Mode

Is there a sleep mode?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Optimizes temperature for sleeping hours.

Lennox S40 Eco Mode

Does it have an eco mode?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Reduces energy use automatically.

Lennox S40 Temperature Presets

Are temperature presets available?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows quick switching between preset temps.

Lennox S40 Smart Home Scenes

Does it support smart home scenes?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Integrates with smart home scenes.

Lennox S40 Automation Rules

Can automation rules be created?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Enables rule-based automation logic.

Lennox S40 Time-Based Triggers

Are time-based triggers supported?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Executes actions at set times.

Lennox S40 Event-Based Triggers

Are event-based triggers supported?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Responds to events like occupancy changes.

Lennox S40 Weather-Based Automation

Does it use weather data for automation?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Adjusts based on weather conditions.

Lennox S40 Demand Response

Does it support demand response?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Participates in utility demand programs.

Lennox S40 Utility Program Compatibility

Is it compatible with utility programs?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Works with energy provider programs.

HVAC Compatibility ¹⁸

Lennox S40 HVAC System Type

Which HVAC system types are supported?

63 Lennox S40 0 Votes Central, Split

5 Thermostats in this range Central, Split

Defines the general HVAC system types supported.

Lennox S40 Heating System Compatibility

What heating systems are supported?

48 Lennox S40 0 Votes Furnace, Heat Pump

4 Thermostats in this range Furnace, Boiler, Heat Pump

Indicates supported heating system types.

Lennox S40 Cooling System Compatibility

What cooling systems are supported?

48 Lennox S40 0 Votes Central AC, Heat Pump

4 Thermostats in this range Central AC, Heat Pump

Indicates supported cooling system types.

Lennox S40 Heat Pump Compatibility

Does it support heat pumps?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates support for heat pump systems.

Lennox S40 Dual Fuel

Does it support dual fuel systems?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Supports dual-fuel HVAC configurations.

Lennox S40 Multi-Stage Heating

Does it support multi-stage heating?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates support for multi-stage heating.

Lennox S40 Multi-Stage Cooling

Does it support multi-stage cooling?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates support for multi-stage cooling.

Lennox S40 Fan Control

Can it control the HVAC fan?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows independent fan operation control.

Lennox S40 Humidifier

Does it support a humidifier?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Supports integrated humidifier control.

Lennox S40 Dehumidifier

Does it support a dehumidifier?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Supports integrated dehumidifier control.

Lennox S40 Ventilator

Does it support ventilators?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Supports ventilation systems like HRV/ERV.

Lennox S40 Boiler Compatibility

Is it compatible with boilers?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates compatibility with boiler systems.

Lennox S40 Radiant Heating Compatibility

Does it support radiant heating?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Supports radiant floor or panel heating.

Lennox S40 Electric Baseboard Compatibility

Does it support electric baseboards?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates compatibility with electric baseboards.

Lennox S40 Gas Furnace Compatibility

Does it support gas furnaces?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates support for gas furnaces.

Lennox S40 Oil Furnace Compatibility

Does it support oil furnaces?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates support for oil furnaces.

Lennox S40 System Voltage Compatibility

What system voltages are supported?

58 Lennox S40 0 Votes Low Voltage

5 Thermostats in this range Low Voltage

Specifies supported control voltages.

Lennox S40 Zone Control

Does it support zone control?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Allows control of HVAC zones.

Power & Electrical ¹²

Lennox S40 Power Source

What is the power source?

58 Lennox S40 0 Votes Hardwired

5 Thermostats in this range Hardwired

Indicates how the thermostat receives power.

Lennox S40 Input Voltage

What input voltage is required?

22 Volt 0 Votes

29.09 Volt (Average)

Specifies required input voltage.

Lennox S40 Operating Voltage Range

What voltage range can it operate in?

18 Lennox S40 0 Votes 20-30 VAC

1 Thermostats in this range 18-30 VAC

Describes acceptable voltage range.

Lennox S40 Battery Backup

Is there battery backup?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Maintains operation during power outages.

Lennox S40 Power Consumption

How much power does it consume?

8 Watt 0 Votes

3.72 Watt (Average)

Measures power usage during operation.

Lennox S40 Standby Power Usage

How much power is used in standby?

3 Watt 0 Votes

1.08 Watt (Average)

Indicates power draw when idle.

Lennox S40 Power Frequency

What power frequency is supported?

60 Hz 0 Votes

59.78 Hz (Average)

Indicates supported electrical frequency.

Lennox S40 Surge Protection

Is surge protection included?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Protects against electrical surges.

Lennox S40 Power Failure Recovery

Does it recover after power failure?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Restores settings after outages.

Lennox S40 Energy Star Certified

Is it Energy Star certified?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates energy efficiency certification.

Lennox S40 Low Power Mode

Does it have a low power mode?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Reduces power usage when idle.

Lennox S40 Charging Support

Does it support charging?

No 0 Votes ~~Lennox S40~~

Thermostats in this range Who knows? (Help us out by suggesting one!)

Indicates support for rechargeable power.

Safety, Compliance & Reliability ¹⁴

Lennox S40 Electrical Safety Certification

What electrical safety certifications does it have?

48 Lennox S40 0 Votes UL

4 Thermostats in this range UL

Lists electrical safety certifications.

Lennox S40 Operating Temperature Range

What is the operating temperature range?

73 Lennox S40 0 Votes 32-120 °F

5 Thermostats in this range 32-104°F

Defines the ambient temperature range for safe operation.

Lennox S40 Operating Humidity Range

What humidity range is supported?

88 Lennox S40 0 Votes 5-95%

5 Thermostats in this range 5-90%

Specifies allowable humidity levels during operation.

Lennox S40 Storage Temperature Range

What is the storage temperature range?

78 Lennox S40 0 Votes -20-140°F

6 Thermostats in this range -4-140°F

Indicates safe temperature range when not in use.

Lennox S40 Warranty Length

How long is the warranty?

98 Lennox S40 0 Votes 5 years

5 Thermostats in this range 5 years

Indicates duration of warranty coverage.

Lennox S40 Regulatory Compliance

What regulatory standards does it meet?

38 Lennox S40 0 Votes FCC

3 Thermostats in this range FCC

Indicates compliance with regulations.

Lennox S40 EMC Compliance

Is it EMC compliant?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Indicates electromagnetic compatibility compliance.

Lennox S40 Fire Safety Rating

Does it meet fire safety requirements?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Indicates fire resistance or safety design.

Lennox S40 Overheat Protection

Is overheat protection included?

No 0 Votes ~~Lennox S40~~

Yes Thermostats in this range

Protects device from overheating.

Lennox S40 Fail-Safe Mode

Does it have a fail-safe mode?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Ensures safe behavior during failure.

Lennox S40 System Alerts

Does it provide system alerts?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Notifies users of system issues.

Lennox S40 Maintenance Alerts

Are maintenance alerts provided?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Reminds users of maintenance needs.

Lennox S40 Diagnostic Tools

Are diagnostic tools available?

Yes 0 Votes Lennox S40

Yes Thermostats in this range

Provides tools for troubleshooting.

Lennox S40 Expected Lifespan

What is the expected lifespan?

10 years 0 Votes

9.89 years (Average)

Estimates usable product lifespan.

Surveys

Because hot takes deserve votes.

Lennox S40 Temperature Accuracy

How accurate is this thermostat at maintaining the set temperature during daily use?

Extremely accurate — Within plus or minus 0.5 degrees 0 Votes

Very accurate — Within plus or minus 1 degree 0 Votes

Decently accurate — Within plus or minus 2 degrees 0 Votes

Somewhat inconsistent — Within plus or minus 3 degrees 0 Votes

Very inconsistent — More than plus or minus 3 degrees 0 Votes

Lennox S40 Response Speed to Temperature Changes

How quickly does this thermostat react after the temperature setting is adjusted?

Instant response — Under 30 seconds 0 Votes

Quick response — 30 seconds to 1 minute 0 Votes

Moderate response — 1 to 3 minutes 0 Votes

Slow response — 3 to 5 minutes 0 Votes

Very slow response — Over 5 minutes 0 Votes

Lennox S40 Ease of Setup and Installation

How easy is it to install and set up this thermostat for the first time?

Super easy and stress free — Finished in under 15 minutes 0 Votes

Pretty straightforward — About 15 to 30 minutes 0 Votes

Manageable with effort — Around 30 to 60 minutes 0 Votes

Time consuming and confusing — 1 to 2 hours 0 Votes

Extremely frustrating — Over 2 hours 0 Votes

Lennox S40 Ease of Daily Use

How easy is it to control and adjust this thermostat in everyday use?

Effortless and intuitive — No learning needed 0 Votes

Mostly easy to use — Minor learning curve 0 Votes

Usable but not smooth — Takes regular effort 0 Votes

Often confusing — Requires frequent checking 0 Votes

Hard to use — Causes daily frustration 0 Votes

Lennox S40 Smart Features and App Experience

How well do the smart features and mobile app work with this thermostat?

Smooth and reliable — No crashes or delays 0 Votes

Mostly reliable — Rare glitches 0 Votes

Usable but basic — Limited features 0 Votes

Unreliable — Frequent bugs or delays 0 Votes

Barely usable — Often fails to work 0 Votes

Lennox S40 Energy Efficiency and Savings

How much does this thermostat help reduce energy usage over time?

Major savings — Over 20 percent reduction 0 Votes

Noticeable savings — 10 to 20 percent 0 Votes

Some savings — 5 to 10 percent 0 Votes

Minimal savings — Under 5 percent 0 Votes

No savings — No noticeable reduction 0 Votes

Lennox S40 Noise Level During Operation

How noticeable is the noise from this thermostat during normal operation?

Completely silent — No audible sound 0 Votes

Very quiet — Barely noticeable 0 Votes

Occasionally noticeable — Soft clicking sounds 0 Votes

Often noticeable — Clearly audible sounds 0 Votes

Annoyingly loud — Distracting noise 0 Votes

Lennox S40 Design and Display Appeal

How appealing is the look and display of this thermostat in a home environment?

Modern and premium — Looks high end 0 Votes

Clean and stylish — Fits most interiors 0 Votes

Simple and acceptable — Nothing special 0 Votes

Outdated design — Feels old fashioned 0 Votes

Unattractive look — Stands out poorly 0 Votes

Lennox S40 Durability and Build Quality

How durable does this thermostat feel with long term everyday use?

Very durable — Expected to last 10 years or more 0 Votes

Solid build — Around 7 to 10 years 0 Votes

Average quality — About 5 to 7 years 0 Votes

Feels fragile — Roughly 3 to 5 years 0 Votes

Very flimsy — Under 3 years 0 Votes

Lennox S40 Pricing and Value

How does the price of this thermostat feel compared to its overall features and performance?

Great value for money — Worth every dollar 0 Votes

Pretty good price — Slightly above average 0 Votes

Fair deal — Matches what you get 0 Votes

Kinda pricey — Costs more than expected 0 Votes

Crazy expensive — Not worth the price 0 Votes

Guides ¹

Yes, we brought proof.

Files ¹

Lennox S40 User Manual

lennox.com

4 months ago

Reviews ⁰

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Average Rating

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Highlights 111

Why is Lennox S40 better than other thermostats ?

General Information

Physical & Installation

Display & Controls

Connectivity & Smart Features

Sensors & Monitoring

Scheduling & Automation

HVAC Compatibility

Power & Electrical

Safety, Compliance & Reliability

Quick Take

Lennox S40

Specifications & Facts 147

General Information 16

Lennox S40 User Interface Type

Lennox S40

Lennox S40 Product Type

Lennox S40

Lennox S40 Smart Thermostat

Lennox S40

Lennox S40 Learning Capability

Lennox S40

Lennox S40 Mobile App

Lennox S40

Lennox S40 Country of Manufacture

Lennox S40 Release Year

Lennox S40 Thermostat Category

Lennox S40 Control Method

Lennox S40 Language Support

Lennox S40 Color

Lennox S40 Intended Use

Lennox S40 Installation Location

Lennox S40 Voice Assistant

Lennox S40 Replaceable Faceplate

Lennox S40 Modular Design

Physical & Installation 17

Lennox S40 Width

Lennox S40

Lennox S40 Depth

Lennox S40

Lennox S40 Height

Lennox S40

Lennox S40 Weight

Lennox S40

Lennox S40 Wall Plate

Lennox S40

Lennox S40 Wiring Requirement

Lennox S40

Lennox S40 Professional Installation Recommended

Lennox S40

Lennox S40 Installation Difficulty Level

Lennox S40

Lennox S40 Wall Compatibility

Lennox S40

Lennox S40 Tamper Resistant Design

Lennox S40

Lennox S40 Mounting Type

Lennox S40 Installation Orientation

Lennox S40 Trim Plate Compatibility

Lennox S40 Recessed Mount

Lennox S40 Surface Mount

Lennox S40 Detachable Unit

Lennox S40 Installation Accessories

Display & Controls 18

Lennox S40 Display Size

Lennox S40

Lennox S40 Backlight

Lennox S40

Lennox S40 Screen Resolution

Lennox S40

Lennox S40 Display Orientation

Lennox S40

Lennox S40 Accessibility Features

Lennox S40

Lennox S40 Touchscreen

Lennox S40

Lennox S40 Adjustable Brightness

Lennox S40

Lennox S40 Color Display

Highlights ¹¹¹

Specifications & Facts ¹⁴⁷

General Information ¹⁶

Physical & Installation ¹⁷

Display & Controls ¹⁸

Connectivity & Smart Features ¹⁷

Sensors & Monitoring ¹⁷

Scheduling & Automation ¹⁸