# Honeywell Home T9 Smart Thermostat vs Mysa Smart Thermostat: specs and price compared

A sourced, side-by-side comparison of the Honeywell Home T9 Smart Thermostat (Honeywell Home) and Mysa Smart Thermostat (Mysa) among smart thermostats.

## Side by side

| Spec | Honeywell Home T9 Smart Thermostat | Mysa Smart Thermostat |
| --- | --- | --- |
| US price | $209.99 | not published |
| Brand | Honeywell Home | Mysa |
| Released | 2019 | 2025 |
| Display | Graphical color touchscreen, 4.92 in H x 3.7 in W | LED display with touch buttons (temperature up/down, mode left/right) |
| Sensors included | Includes one wireless SmartRoom sensor (temperature + humidity); up to 20 additional SmartRoom sensors supported | Temperature (±0.5°F accuracy), humidity (±2%), light sensor, proximity sensor |
| Geofencing | Yes | Yes |
| Hvac compatibility | Up to 2H/2C conventional systems; up to 3H/2C heat pump systems; 24V low-voltage | Most 24V central HVAC: gas/oil/electric furnaces, central AC, heat pumps with AUX heat; single and multi-stage conventional and heat pump; C-wire required or adapter available |
| C wire required | No | Yes |
| Voice assistants | Amazon Alexa, Google Assistant, Apple HomeKit, Microsoft Cortana, Samsung SmartThings, IFTTT, Ring | Matter certification expected 2026 for Alexa, Google Home, Apple HomeKit; no current native integration documented |
| Energy reports | Yes | Yes |

## Key differences

- Display: Honeywell Home T9 Smart Thermostat Graphical color touchscreen, 4.92 in H x 3.7 in W vs Mysa Smart Thermostat LED display with touch buttons (temperature up/down, mode left/right)
- Sensors included: Honeywell Home T9 Smart Thermostat Includes one wireless SmartRoom sensor (temperature + humidity); up to 20 additional SmartRoom sensors supported vs Mysa Smart Thermostat Temperature (±0.5°F accuracy), humidity (±2%), light sensor, proximity sensor
- Hvac compatibility: Honeywell Home T9 Smart Thermostat Up to 2H/2C conventional systems; up to 3H/2C heat pump systems; 24V low-voltage vs Mysa Smart Thermostat Most 24V central HVAC: gas/oil/electric furnaces, central AC, heat pumps with AUX heat; single and multi-stage conventional and heat pump; C-wire required or adapter available
- C wire required: Honeywell Home T9 Smart Thermostat No vs Mysa Smart Thermostat Yes
- Voice assistants: Honeywell Home T9 Smart Thermostat Amazon Alexa, Google Assistant, Apple HomeKit, Microsoft Cortana, Samsung SmartThings, IFTTT, Ring vs Mysa Smart Thermostat Matter certification expected 2026 for Alexa, Google Home, Apple HomeKit; no current native integration documented

## What reviewers say

**Honeywell Home T9 Smart Thermostat** — Two whitelisted testers (TechHive, Tom's Guide) reviewed the T9 hands-on in 2019 and rate it a strong, sensor-focused smart thermostat, though neither ran lab benchmarks. Both praise best-in-class remote sensors and easy setup; both flag the missing onboard motion sensor and a less-intuitive app. All six quoted lines verified verbatim against the source text. (2 sourced reviews.)

## Sources

- Honeywell Home T9 Smart Thermostat: https://www.honeywellhome.com/products/t9-smart-thermostat (honeywellhome.com, verified 2026-06-15)
- Mysa Smart Thermostat: https://getmysa.com/pages/thermostats/mysa-thermostat (getmysa.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/smart-thermostats/honeywell-home-t9-vs-mysa-smart-thermostat/
Cite: Per The Front Desk Review, Honeywell Home T9 Smart Thermostat ($209.99) vs Mysa Smart Thermostat (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-thermostats/honeywell-home-t9-vs-mysa-smart-thermostat/
License: CC BY 4.0.