
ecobee3 Lite
Score: 82/100
Honeywell Home RTH9600WF
Score: 78/100Rankings

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 Honeywell Home RTH9600WF is an ENERGY STAR-certified smart thermostat featuring a vibrant color touchscreen and extensive smart-home integration. Its requirement for a dedicated C-wire and incompatibility with certain heating systems limit installation flexibility. Ideal for homeowners with compatible 24 VAC systems seeking advanced display and remote control.
| Attribute | ![]() | ![]() |
|---|---|---|
3 yearsbest | 2 years | |
3.5 inchbest | — | |
| ↓ lower better | 2.268 kg | 0.318 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 | Works with 24 VAC systems (forced air, heat pump, hydronic, hot water, steam); requires C-wire; incompatible with millivolt, 120/240V baseboard heat, heating-only oil furnaces without C-wire |
Warranty (years) | 3 years | 2 years |
Connectivity(1) | ||
Smart Home Integration | Siri, Google Assistant, Samsung SmartThings, IFTTT, Alexa | Amazon Alexa, Google Assistant, IFTTT, iOS, Android |
Power & Installation(1) | ||
Power Source | Hardwired 24V | Battery |
Build & Design(2) | ||
Device Weight (kg) | 2.268 kg | 0.318 kg |
Device Dimensions (H×W×D) (mm) | 102.9x102.9x21.4 mm mm | 89x22x114 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 such as Consumer Reports evaluate the RTH9600WF on smart-feature performance (Smart IQ), manual operation ease, and automation capabilities, but detailed ratings are behind a subscription wall, leaving only a general acknowledgment of its comprehensive smart-thermostat functionality.

