Lennox S40
(22V24) Smart Thermostat, Touchscreen, WiFi, Communicating System Control, Programmable, High Efficiency…
Price as of 2026-06-03. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in Smart Thermostats
- •You're on a tight budget — $622 above the category average of $158
- •Rating sits in the bottom 1% of Smart Thermostats — higher-rated options exist
- •Google Nest T3016US offers a better rating (4.4/5) at a similar or lower price ($158)
- •Amazon Like-New Amazon Smart Thermostat — 95% cheaper at $40 (Score B+)
- •ecobee SmartThermostat — higher rated at 4.6/5 ($219)
📊 Based on data analysis of 74 products in this category.
Mubboo Score: C-
How It Compares
This Product Lennox S40 | Most Popular Google Nest T3016US | Best Rated ecobee SmartThermostat | Best Value Amazon Like-New Amazon Smart Thermostat | |
|---|---|---|---|---|
| Price | $780 | $157.99 | $219 | $39.99 |
| Rating | 3.6/5 | 4.4/5 | 4.6/5 | 3.9/5 |
| Reviews | 210 | 32,646 | 9,668 | 1,777 |
| Mubboo Score | C- | A- | B+ | B+ |
Quick Specs
- Color
- Black
- Shape
- Rectangular
- Voltage
- 22 Volts
- Backlight
- Yes
- Unit Count
- 1.0 Count
- Screen Size
- 7 Inches
- Control Type
- Touch
- Display Type
- touchscreen
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Verify compatibility with your HVAC system, especially for C-wire requirements; professional installation may be needed for older setups. Note potential quality differences from previous Nest models and check for utility rebates.
- Easy installation and setup
- Energy savings and efficiency
- App-enabled smart controls and learning features
- Modern and attractive design
- Installation difficulties with certain HVAC systems
- Perceived decline in build quality compared to original Nest
- Wi-Fi connectivity problems
Key Features
- ✦To provide worry-free 10 year warranty against manufacturing defects or defects. To maintain warranty validity, it is necessary to hire a certified HVAC loader for proper installat…
- ✦It has a 7 inch high resolution color screen for easy readability. User-friendly touchscreen for easy system configuration and maintenance alerts. Using geographical fencing techno…
- ✦Compatible with 4-wire standard thermostat cables, use protected thermostat cable to prevent noise interference. Works with most 24VAC ovens, air conditioners, air conditioning pro…
- ✦Compatible with traditional HVAC systems with optional Equipment Interface Module (EIM) for control. The Smart Zoom System (iHarmony) allows the entire home improvement with full c…
- ✦On-Demand Weather provides live weather data and seven day forecasts. Quickly set up and configure with the Lennox Smart app. Installer setup displays allow quick system configurat…
Source: product listing on Amazon.
Other Smart Thermostats
Bottom Line
Lennox S40 earns Mubboo Score C-. Priced at $780 — a premium option, above the category average of $158. Rated 3.6/5 from 210+ reviews. Strong buy if: buyers who prioritize quality over price in smart thermostats. Skip if: you're on a tight budget — Google Nest T3016US (Score A-, $158) may fit better.
Frequently Asked Questions
Is the Lennox S40 worth buying in 2026?
It earns a Mubboo Score of C-, with a 3.6/5 rating from 210 reviews — better than 1% of Smart Thermostats we track.
How much does the Lennox S40 cost?
It is currently $780 — premium-tier pricing for Smart Thermostats.
How does the S40 compare to other Smart Thermostats?
The category's most-reviewed alternative is the Google Nest T3016US (4.4/5, 32,646 reviews, $157.99). The S40 carries a Mubboo Score of C- vs A-.
Sources & References
Mubboo may earn a commission from purchases made through links on this page. Prices and availability are accurate as of the last sync (2026-06-03) and may change.