Winner
Updated November 2026
Data from the official Ecobee and Honeywell Home sites.
2026 verdict
A far-off bedroom and a family of iPhone users point to the Ecobee Smart Thermostat Enhanced over the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat.
The Ecobee supports remote room sensors, detects occupancy and proximity, adds Apple HomeKit, joins 5 GHz Wi-Fi and Bluetooth, includes a trim plate and carries a three year warranty against one. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat is the cheaper, long-proven choice, with a customisable colour touchscreen, filter and humidifier pad reminders and monthly energy reports. Both read humidity, send temperature alerts and work with Google Home, Alexa, SmartThings and Home Assistant, and neither supports Matter. Choose the Ecobee Smart Thermostat Enhanced for multi-room comfort and Apple Home, and the Honeywell for a single-zone home on a budget.
Connectivity
- Wi-Fi 2.4/5 GHz
- Bluetooth
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Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Ecobee Smart Thermostat Enhanced | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat | Winner |
|---|---|---|---|
| Rating | 4.4 | 4.3 | Ecobee Smart Thermostat Enhanced |
| Warranty | 3 years | 1 year | Ecobee Smart Thermostat Enhanced |
| Included accessories | Trim Plate | None | Ecobee Smart Thermostat Enhanced |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Ecobee Smart Thermostat Enhanced |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, External Temperature Sensors | Google Home, Alexa, Samsung SmartThings, Home Assistant | Ecobee Smart Thermostat Enhanced |
| Sensors | Proximity / Motion, Occupancy, Temperature, Humidity | Temperature, Humidity | Ecobee Smart Thermostat Enhanced |
| Alerts | Temperature Alerts, Intrude Alerts | Temperature Alerts | Ecobee Smart Thermostat Enhanced |
| System Health Monitor | NO | YES | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat |
| Local Control | YES | NO | Ecobee Smart Thermostat Enhanced |
| Power | C-Wire Required | None | Tie |
| Screen | YES | YES | Tie |
| Energy Savings | YES | YES | Tie |
What the differences mean
Room sensors and occupancy
The Ecobee Smart Thermostat Enhanced works with remote room sensors and detects occupancy, so it can heat the rooms people use. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat supports no room sensors and reads only its own wall.
Apple Home
The Ecobee works with Apple HomeKit; the Honeywell does not. Both support Google Home, Alexa, SmartThings and Home Assistant.
Wi-Fi
The Ecobee joins 2.4 or 5 GHz networks and has Bluetooth. The Honeywell is 2.4 GHz only.
Maintenance reminders
The Honeywell reminds you to change the filter and humidifier pad and sends monthly energy tips. The Ecobee Smart Thermostat Enhanced has no system health reminders, though owners like its detailed energy reports.
Warranty
Three years on the Ecobee Smart Thermostat Enhanced, one year on the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat.
Which one to buy if
- the thermostat hangs in a hallway nobody uses
The Ecobee Smart Thermostat Enhanced can use room sensors and occupancy to heat where people are.
- your family uses iPhones and the Home app
Only the Ecobee supports Apple HomeKit.
- you want the thermostat to track filter changes
The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat has filter and humidifier pad reminders.
- you have one open-plan floor and a tight budget
Room sensors add little there, and the Honeywell is the cheaper unit.
Winner
6% OFF
$187.00
$199.99
- + Rating: 4.4
- + Warranty: 3 years
- + Included accessories: Trim Plate
- - System Health Monitor: NO vs YES
- + System Health Monitor: YES
- - Rating: 4.3 vs 4.4
- - Warranty: 1 year vs 3 years
What owners say
Owners of both thermostats praise a clear colour screen and control from phone or wall, and both groups flag installation without a C wire as the step to plan for. Ecobee Smart Thermostat Enhanced owners, many of them ex-Nest users, single out remote sensors that even out a house whose thermostat sits in a hallway, detailed HVAC reports and lower bills, sometimes with a utility rebate. Their complaints are Ecobee pulling its API program, which makes Home Assistant harder, less granular scheduling and an app that can confuse. Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat owners stress longevity after Nest units failed them, and complain about Resideo cloud outages, remote features that are effectively US-only and a fixed one-degree swing.
Frequently Asked Questions
Ecobee vs Honeywell: which is better, the Ecobee Smart Thermostat Enhanced or the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
The Ecobee Smart Thermostat Enhanced. It adds room sensor support, occupancy detection, Apple HomeKit, dual band Wi-Fi and a three year warranty. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat is the cheaper option with maintenance reminders.
What is the biggest difference between the Ecobee Smart Thermostat Enhanced and the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
Multi-room sensing. The Ecobee Smart Thermostat Enhanced supports remote sensors and occupancy detection, while the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat relies on the reading at the wall.
Which works better with Home Assistant?
Both are listed as working with Home Assistant. Owners of the Ecobee Smart Thermostat Enhanced note that Ecobee pulled its API program and suggest pairing through HomeKit instead, while the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat uses the Honeywell Total Connect Comfort integration.
Do they support Matter?
No. Neither the Ecobee Smart Thermostat Enhanced nor the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat supports Matter.
Who should buy the Ecobee Smart Thermostat Enhanced?
Homes with rooms that run hot or cold, Apple Home users and anyone who wants detailed energy reports and a three year warranty.
Who should buy the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
Single-zone homes that want a proven thermostat with a customisable colour screen and filter reminders at a lower price.
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