
ecobee3 Lite
Score: 82/100
Google Nest Thermostat
Score: 76/100Rankings

The Ecobee3 Lite offers a budget-friendly 3.5-inch touchscreen, built-in sensors and broad HomeKit, Alexa and Google Assistant support. Its reliance on a C-wire or power extender kit and modest display resolution may deter users seeking higher-end visuals. Best suited for cost-conscious owners of 24 V HVAC systems who value multi-room sensing.

The Google Nest Thermostat offers Wi-Fi and Bluetooth connectivity with a compact 2.4-inch display and Energy Star efficiency. Its main trade-off is occasional C-wire requirement and a modest display size. Ideal for users seeking an affordable, Google-centric smart thermostat.
| Attribute | ![]() | ![]() |
|---|---|---|
3 yearsbest | 1 years | |
3.5 inchbest | 2.4 inch | |
| ↓ lower better | 2.268 kg | 0.139 kgbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(2) | ||
HVAC Compatibility | Approximately 95% of 24V systems | Supports heating stages W1-W3, cooling stages Y1-Y2, heat pump with auxiliary and emergency heat (O/B, AUX, E) |
Warranty (years) | 3 years | 1 years |
Connectivity(1) | ||
Smart Home Integration | Siri, Google Assistant, Samsung SmartThings, IFTTT, Alexa | Google Home |
Power & Installation(2) | ||
C‑Wire Requirement | true | false |
Power Source | Hardwired 24V | HVAC system wiring |
Display(2) | ||
Screen Size (inch) | 3.5 inch | 2.4 inch |
Resolution | 320x480 | 240x320 |
Build & Design(2) | ||
Device Weight (kg) | 2.268 kg | 0.139 kg |
Device Dimensions (H×W×D) (mm) | 102.9x102.9x21.4 mm mm | 27.2x84.0x27.3 mm |


Products in the top-left offer the best value (high score, low price).

Industry analysts and the manufacturer emphasize the Ecobee3 Lite's strong energy-efficiency credentials, easy installation with the optional Power Extender Kit, and its broad smart-home ecosystem support, positioning it as a cost-effective solution that can still achieve notable savings of around 23 % per year.
