T9

Name: Honeywell T9
Brand: Honeywell
Rating: 79 (4 reviews)

Released Apr 1, 2019 · Analysis updated Mar 2, 2026

Smart thermostat offering multi-room humidity monitoring with 20 sensors, broad HVAC compatibility, and included c-wire kit. The Honeywell T9 scores 79/100 based on 4 expert reviews in the smart thermostats category. Coverage includes reviews from Techhive, Smartthermostatguide, Cnet, and Theverge.

Critic Score

What's this?

based on 4 expert reviews

TechhiveSmartthermostatguideCnetTheverge

Low confidence · only 4 reviews

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Pros

Sensors can monitor humidity(2)
Supports up to 20 remote sensors(2)

Cons

No motion sensor in the thermostat itself(2)

4 Expert Reviews

Apr 26, 2019

The Honeywell Home T9 Smart Thermostat doesn’t have an integrated smart speaker, and it won’t automatically adapt to your comings and goings, but it does have best-in-breed room sensors.

Nov 26, 2021

The Honeywell T9 thermostat is capable and affordable with just a few annoyances.

Mar 5, 2020

The $200 Resideo Honeywell Home T9 Smart Thermostat comes with a temperature and humidity sensor and geofencing capabilities that automatically adjust your home and away settings based on your phone's...

Jul 23, 2019

The Honeywell Home T9 is a good smart thermostat system with an easy-to-use interface and decent flexibility, but its limitations make it feel less smart than competitors like Ecobee.