
ecobee3 Lite
Score: 82/100
Emerson Sensi Touch 2
Score: 77/100Rankings

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.

Emerson's Sensi Touch 2 offers a full-color touchscreen and Alexa voice control with a focus on privacy and easy DIY installation. It mandates a C-wire and currently supports only Alexa, limiting broader smart-home ecosystems. It fits well for users who prioritize a sleek interface and straightforward setup.
| Attribute | ![]() | ![]() |
|---|---|---|
3 yearsbest | 3 yearsbest | |
3.5 inchbest | — | |
| ↓ lower better | 2.268 kg | 0.281 kgbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(1) | ||
HVAC Compatibility | Approximately 95% of 24V systems | Works with most HVAC systems (C‑wire required) |
Connectivity(1) | ||
Smart Home Integration | Siri, Google Assistant, Samsung SmartThings, IFTTT, Alexa | Alexa |
Build & Design(2) | ||
Device Weight (kg) | 2.268 kg | 0.281 kg |
Device Dimensions (H×W×D) (mm) | 102.9x102.9x21.4 mm mm | 19.6×82.6×142.2 mm 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.

Professional reviewers have highlighted the Sensi Touch as a leading smart thermostat, noting its award-winning status for best overall performance from 2017 through 2019, which underscores its solid feature set and user-friendly design.
