
Honeywell Home RTH9585WF1004
Score: 73/100
ecobee Smart Thermostat Premium
Score: 86/100Rankings

Ecobee Smart Thermostat Premium combines a 4-inch high-resolution touchscreen with built-in air-quality monitoring, smoke detection, and SmartSensor room control. It demands a C-wire (or Power Extender Kit) and carries a higher price point. It excels for users desiring premium features and robust performance.

Honeywell Home RTH9585WF1004 offers a sleek full-color touchscreen and supports both Alexa and Google Assistant, backed by ENERGY STAR certification. It requires a C-wire and can suffer from temperature accuracy and occasional app glitches. Best suited for homeowners wanting a customizable display and multi-assistant integration at a moderate price.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 0.5 °Cbest | |
1 years | 3 yearsbest | |
— | 4 inchbest | |
| ↓ lower better | 0.204 kgbest | 0.249 kg |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(2) | ||
HVAC Compatibility | Forced air, hot water, steam, heat pumps | 24V |
Warranty (years) | 1 years | 3 years |
Connectivity(1) | ||
Smart Home Integration | Alexa, Google Assistant, SmartThings, IFTTT | Siri, Alexa, Google Assistant |
Power & Installation(1) | ||
Power Source | 24V | C‑wire |
Display(1) | ||
Display Type | Full-color touchscreen | Touchscreen |
Build & Design(2) | ||
Device Weight (kg) | 0.204 kg | 0.249 kg |
Device Dimensions (H×W×D) (mm) | 22×114×89 mm mm | 103.9×103.9×25.9 mm mm |

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

Professional reviewers commend the Honeywell RTH9585WF1004 for its stylish, full-color display, easy integration with Alexa and Google Assistant, and its Smart Response learning that simplifies scheduling. They also highlight its ENERGY STAR rating and Demand Response capability as strong points for energy-conscious buyers, while noting its reliance on a C-wire as a potential limitation.
Everyday users appreciate the intuitive touchscreen, quick setup, reliable Wi-Fi control, and attractive customizable design. Common praise centers on energy-usage reports and voice-control convenience, whereas recurring complaints involve temperature accuracy, small size, occasional touchscreen lag, app instability, and Wi-Fi connectivity issues.


