Winner
Updated November 2026
Data from the official Ecobee and Honeywell Home sites.
2026 verdict
Do you need a thermostat that reads more than the wall it hangs on?
Then the Ecobee Smart Thermostat Premium is the smart thermostat to buy of these two. It ships with a remote SmartSensor and measures humidity, CO2 and TVOC, none of which the Honeywell Home T5 Smart Thermostat can do. The Ecobee also adds dual-band Wi-Fi, Bluetooth, a color touchscreen, a built-in speaker and a 3 year warranty. The Honeywell Home T5 Smart Thermostat is the plainer, cheaper route: same list of voice and smart home platforms, a larger 4.95 inch screen, scheduling suggestions and a system health monitor the Ecobee lacks. Choose the Ecobee Smart Thermostat Premium for an uneven house or air quality alerts, and the Honeywell Home T5 Smart Thermostat for a one-zone home that only needs schedules and geofencing.
vs
29% OFF
$77.99
$109.99
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Ecobee Smart Thermostat Premium | Honeywell Home T5 Smart Thermostat | Winner |
|---|---|---|---|
| Price | $239.89 | $77.99 | Honeywell Home T5 Smart Thermostat |
| Rating | 4.3 | 4.2 | Ecobee Smart Thermostat Premium |
| Warranty | 3 years | 2 years | 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, External Temperature Sensors | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant | Ecobee Smart Thermostat Premium |
| Sensors | Proximity / Motion, Occupancy, Temperature, Humidity, TVOC, CO₂ | Temperature | 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 T5 Smart Thermostat |
| Speaker | YES | NO | Ecobee Smart Thermostat Premium |
| Power | C-Wire Required | None | Tie |
| Screen | YES | YES | Tie |
What the differences mean
Remote room sensor
The Ecobee Smart Thermostat Premium includes a SmartSensor and can pick which reading to follow by presence, so the room people are in sets the temperature. The Honeywell Home T5 Smart Thermostat cannot use one and only measures the wall it is mounted on, which matters most in a two-storey or long house.
What it senses
The Ecobee measures humidity, CO2, TVOC, occupancy and proximity and can raise air quality alerts. The Honeywell reads temperature only. If you want a thermostat that also tells you when a room is stuffy, only the Ecobee does.
Screen and speaker
The Ecobee has a 4 inch color touchscreen showing weather and a built-in speaker for voice control on the device. The Honeywell has a larger 4.95 inch touchscreen, not color, and no speaker, so voice runs through your phone or another speaker.
Wi-Fi and Bluetooth
The Ecobee joins 2.4 and 5 GHz networks and has Bluetooth. The Honeywell is 2.4 GHz only with no Bluetooth, which is fine near the router and less forgiving on a crowded network.
Warranty and system checks
The Ecobee carries a 3 year warranty against 2 years on the Honeywell. In return the Honeywell has a system health monitor and scheduling suggestions, which the Ecobee does not list.
Which one to buy if
- one bedroom is always hotter or colder than the hallway
The Ecobee Smart Thermostat Premium comes with a remote sensor and can follow the room you are actually in.
- you want air quality readings and alerts from the thermostat
It measures CO2, TVOC and humidity and raises air quality alerts, which the Honeywell Home T5 Smart Thermostat cannot.
- it is a one-zone apartment and you only want a schedule and geofencing
The Honeywell Home T5 Smart Thermostat covers scheduling and Auto Home and Away at a noticeably lower price.
- you want a larger, high-contrast screen and a system health monitor
The Honeywell's 4.95 inch display and its system health monitor are things the Ecobee does not offer.
Winner
8% OFF
$239.89
$259.99
- + Rating: 4.3
- + Warranty: 3 years
- + Included accessories: Trim Plate, Temperature Sensor
- - Price: $239.89 vs $77.99
- - System Health Monitor: NO vs YES
29% OFF
$77.99
$109.99
- + Price: $77.99
- + System Health Monitor: YES
- - Rating: 4.2 vs 4.3
- - Warranty: 2 years vs 3 years
What owners say
Owners of both thermostats agree that the real payoff is remote control and a schedule that stops the house heating while nobody is home, and neither group reports Matter or a learning mode as a reason to buy. Ecobee Smart Thermostat Premium owners single out the bundled SmartSensor evening out a hot upstairs and a cold hallway, the screen that wakes as you approach and voice control through Alexa or Siri on the device itself, while their complaints are wiring surprises in older homes that sometimes end with an electrician, occasional app glitches and slow support. Honeywell Home T5 Smart Thermostat owners talk about a swap that can take seconds when replacing an older Honeywell, a clean black face and good value, and they warn about the C wire requirement, units that would not work with their system and software that got worse after a promising install.
Frequently Asked Questions
Which is better overall: Ecobee Smart Thermostat Premium or Honeywell Home T5 Smart Thermostat?
The Ecobee Smart Thermostat Premium. It includes a remote sensor, adds humidity, CO2 and TVOC sensing, has a color screen with a speaker and comes with a 3 year warranty. The Honeywell Home T5 Smart Thermostat is the cheaper choice for a simple one-zone home.
What is the biggest difference between the Ecobee Smart Thermostat Premium and the Honeywell Home T5 Smart Thermostat?
Sensing. The Ecobee Smart Thermostat Premium ships with a SmartSensor, tracks occupancy and air quality and can balance rooms, while the Honeywell Home T5 Smart Thermostat only measures temperature where it is mounted.
Do the Ecobee Smart Thermostat Premium and the Honeywell Home T5 Smart Thermostat work with Apple HomeKit, Alexa and Google Home?
Yes to all three on both, and both also list SmartThings and Home Assistant. Neither supports Matter, so the smart home platform list does not separate the Ecobee Smart Thermostat Premium from the Honeywell Home T5 Smart Thermostat.
Does the Honeywell Home T5 Smart Thermostat work with remote room sensors like the Ecobee Smart Thermostat Premium?
No. The Ecobee Smart Thermostat Premium includes a room sensor and supports selecting sensors by presence, while the Honeywell Home T5 Smart Thermostat has no external temperature sensor support.
Who should buy the Ecobee Smart Thermostat Premium?
Owners of houses with uneven temperatures, anyone who wants air quality alerts, and buyers who want a color touchscreen with a built-in speaker and dual-band Wi-Fi.
Who should buy the Honeywell Home T5 Smart Thermostat?
Buyers on a budget with a single-zone home, or replacing an older Honeywell, who want scheduling, geofencing and a large readable screen without paying for sensors they will not use.
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