T9

Name: Honeywell T9
Brand: Honeywell
Rating: 79 (5 reviews)

Released Apr 1, 2019 · Analysis updated Mar 24, 2026

Smart thermostat with humidity-monitoring sensors, supports up to 20 remote sensors, and extensive HVAC compatibility including C-wire kit. The Honeywell T9 scores 79/100 based on 5 expert reviews in the smart thermostats category. Coverage includes reviews from Techhive, Smartthermostatguide, Pcmag, and Cnet.

Critic Score

What's this?

based on 5 expert reviews

TechhiveSmartthermostatguidePcmagCnetTheverge

Low confidence · only 5 reviews

Where to buy

amazon$134.99

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Pros

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

Cons

No motion sensor in the thermostat itself(2)

5 Expert Reviews

Established publication04/2019

Established publicationApr 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.

Independent publication11/2021

Independent publicationNov 26, 2021

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

Major publication07/2019

Major publicationJul 30, 2019

The Honeywell Home T9 Smart Thermostat is a dual-band Wi-Fi thermostat that uses long-range sensors to provide uniform temperatures throughout your home.

Major publication03/2020

Major publicationMar 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...

Major publication07/2019

Major publicationJul 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.