
Honeywell RTH9580WF
Score: 75/100
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.

The Honeywell RTH9580WF delivers a sleek low-profile design, vibrant color touchscreen and Smart Response learning for precise temperature control. Its drawbacks include discontinuation, reliance on a C-wire and occasional Wi-Fi reliability issues. It suits tech-savvy homeowners who value aesthetics and learning algorithms but can manage potential support limitations.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 0.5 °Cbest | |
1 years | 3 yearsbest | |
— | 4 inchbest | |
| ↓ lower better | 0.544 kg | 0.249 kgbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(2) | ||
HVAC Compatibility | Compatible with 24 V HVAC (forced air, hydronic, heat pump, oil, gas, electric); not compatible with millivolt or 120/240 V baseboard electric heat | 24V |
Warranty (years) | 1 years | 3 years |
Sensors(1) | ||
Temperature Sensor Accuracy (°C) | ±1°F °C | 0.5 °C |
Connectivity(1) | ||
Smart Home Integration | Alexa | Siri, Alexa, Google Assistant |
Power & Installation(1) | ||
Power Source | 24 V | C‑wire |
Display(1) | ||
Display Type | Capacitive touchscreen | Touchscreen |
Features(1) | ||
Geofencing | false | true |
Build & Design(2) | ||
Device Weight (kg) | 0.5443 kg | 0.249 kg |
Device Dimensions (H×W×D) (mm) | 0.88x3.5x4.5 in 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 RTH9580WF for its ultra-slim profile, vibrant customizable touchscreen, and Smart Response learning that balances comfort with energy efficiency. Editors also note the ease of programming, integrated weather data, and ENERGY STAR rating as strong points, while flagging the product's discontinuation and limited sensor array as drawbacks.
Everyday users appreciate the intuitive touch interface, precise temperature control, and the convenience of remote app management, often citing the customizable display as a fun feature. Recurring complaints focus on Wi-Fi connectivity challenges, occasional app glitches, and the lack of automatic geofencing, with some expressing concern over the thermostat being discontinued.
“Intuitive touch interface”

“Wi-Fi setup issues”



