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

A sourced, side-by-side comparison of the Honeywell Home T9 Smart Thermostat (Honeywell Home) and GE Cync Smart Thermostat (GE Cync) among smart thermostats. GE Cync Smart Thermostat is the cheaper of the two at $119.99.

## Side by side

| Spec | Honeywell Home T9 Smart Thermostat | GE Cync Smart Thermostat |
| --- | --- | --- |
| US price | $209.99 | $119.99 |
| Brand | Honeywell Home | GE Cync |
| Released | 2019 | — |
| Display | Graphical color touchscreen, 4.92 in H x 3.7 in W | Backlit LCD display (always on); button and app control (Control Type: Buttons and App) |
| Sensors included | Includes one wireless SmartRoom sensor (temperature + humidity); up to 20 additional SmartRoom sensors supported | No remote sensor included (package contains 1 thermostat); Cync Room Temperature Sensors sold separately |
| Geofencing | Yes | — |
| Hvac compatibility | Up to 2H/2C conventional systems; up to 3H/2C heat pump systems; 24V low-voltage | Most residential 24V heating and cooling systems; designed for C-wire systems, Power Extender Kit (PEK) included for homes without a C-wire; 3- and 4-wire installation options |
| C wire required | No | No |
| Voice assistants | Amazon Alexa, Google Assistant, Apple HomeKit, Microsoft Cortana, Samsung SmartThings, IFTTT, Ring | Amazon Alexa, Google Assistant (Google Home) |
| 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 GE Cync Smart Thermostat Backlit LCD display (always on); button and app control (Control Type: Buttons and App)
- Sensors included: Honeywell Home T9 Smart Thermostat Includes one wireless SmartRoom sensor (temperature + humidity); up to 20 additional SmartRoom sensors supported vs GE Cync Smart Thermostat No remote sensor included (package contains 1 thermostat); Cync Room Temperature Sensors sold separately
- Hvac compatibility: Honeywell Home T9 Smart Thermostat Up to 2H/2C conventional systems; up to 3H/2C heat pump systems; 24V low-voltage vs GE Cync Smart Thermostat Most residential 24V heating and cooling systems; designed for C-wire systems, Power Extender Kit (PEK) included for homes without a C-wire; 3- and 4-wire installation options
- Voice assistants: Honeywell Home T9 Smart Thermostat Amazon Alexa, Google Assistant, Apple HomeKit, Microsoft Cortana, Samsung SmartThings, IFTTT, Ring vs GE Cync Smart Thermostat Amazon Alexa, Google Assistant (Google Home)

## 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)
- GE Cync Smart Thermostat: https://www.gelighting.com/led-lights/bulbs/ge-cync-smart-thermostat-energy-star-certified-programmable-wifi-thermostat-works (gelighting.com, verified 2026-07-10)

Canonical: https://frontdeskreview.com/gear/smart-thermostats/honeywell-home-t9-vs-ge-cync-smart-thermostat/
Cite: Per The Front Desk Review, Honeywell Home T9 Smart Thermostat ($209.99) vs GE Cync Smart Thermostat ($119.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-thermostats/honeywell-home-t9-vs-ge-cync-smart-thermostat/
License: CC BY 4.0.