Winner
Data from Amazon and official Ecobee and Honeywell Home sites.
2026 verdict
Ecobee Smart Thermostat Premium wins the 2026 matchup against Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, mainly on rating, warranty, and included accessories. It has the clearer edge on rating, warranty, and included accessories, and it stays ahead on connectivity and integrations. Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat can still be the right pick, but only if price and system health monitor outweigh the wider strengths of Ecobee Smart Thermostat Premium. For most setups, Ecobee Smart Thermostat Premium is the smarter buy.
| Feature | Ecobee Smart Thermostat Premium | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat | Winner |
|---|---|---|---|
| Price | $149.63 | $127.99 | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat |
| Rating | 4.5 | 4.3 | Ecobee Smart Thermostat Premium |
| Warranty | 3 years | 1 year | Ecobee Smart Thermostat Premium |
| Included accessories | Trim Plate, Temperature Sensor | None | Ecobee Smart Thermostat Premium |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Ecobee Smart Thermostat Premium |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, IFTTT, External Temperature Sensors | Google Home, Alexa, Home Assistant | Ecobee Smart Thermostat Premium |
| Sensors | Proximity / Motion, Occupancy, Temperature, Humidity, TVOC, CO₂ | Temperature, Humidity | Ecobee Smart Thermostat Premium |
| Alerts | Temperature Alerts, Air Quality Alerts, Fire Alerts, Intrude Alerts | Temperature Alerts | Ecobee Smart Thermostat Premium |
| System Health Monitor | NO | YES | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat |
| Speaker | YES | NO | Ecobee Smart Thermostat Premium |
| Screen | YES | YES | Tie |
| Energy Savings | YES | YES | Tie |
Winner
27% OFF
$149.63
$204.97
- + Rating: 4.5
- + Warranty: 3 years
- + Included accessories: Trim Plate, Temperature Sensor
- - Price: $149.63 vs $127.99
- - System Health Monitor: NO vs YES
29% OFF
$127.99
$179.99
- + Price: $127.99
- + System Health Monitor: YES
- - Rating: 4.3 vs 4.5
- - Warranty: 1 year vs 3 years
Frequently Asked Questions
Which is better overall: Ecobee Smart Thermostat Premium or Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
Ecobee Smart Thermostat Premium has the stronger overall profile in this comparison, especially for rating, warranty, and included accessories.
What is the biggest difference between Ecobee Smart Thermostat Premium and Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
Price is one of the clearest differences: Ecobee Smart Thermostat Premium lists $149.63, while Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat lists $127.99.
Which one looks better on price?
Ecobee Smart Thermostat Premium is listed at $149.63, while Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat is listed at $127.99. Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat (better spec).
Who should buy Ecobee Smart Thermostat Premium?
Choose Ecobee Smart Thermostat Premium if your priority is rating and warranty and that matters more than price.
Who should buy Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
Choose Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat if your priority is price and system health monitor and that matters more than rating.
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