The short version: The Lyric T9 is Honeywell’s best non-pro-install thermostat: a 3.5-inch touchscreen with geofencing and support for up to 20 remote room sensors, one included in the box. Independent reviewers rate it as one of the more capable mainstream smart thermostats, behind ecobee on app polish but ahead of Honeywell’s own T6 Pro on features. If you want room-level comfort without paying ecobee Premium prices, this is the one to look at.

Who It’s For

The T9 fits forced-air homes — gas, oil, electric furnace, or heat pump — where different rooms run different temperatures and you want the thermostat to prioritize the room you’re actually in rather than the hallway it happens to be mounted in. It’s a reasonable upgrade path for existing Honeywell Lyric or T-series owners, and a solid choice for new buyers who want geofencing and sensors without ecobee’s price tag.

It’s not for Apple HomeKit households — Honeywell doesn’t support HomeKit on any current thermostat — and it’s not the pick if you don’t care about room sensors, in which case the cheaper T6 Pro covers the basics for less money.

Design & Build

The T9 has a white bezel around a bright 3.5-inch touchscreen. Current temperature displays in orange while heating and blue while cooling, with outdoor temperature shown in gray text — a small touch that reviewers noted as genuinely useful at a glance. It’s a noticeably nicer display than the T6 Pro’s, closer in size to ecobee’s screen, though the interface design is Honeywell’s own rather than a copy of ecobee’s swipe-based UI.

Setup & Compatibility

C-wire situation: The T9 works without a C-wire in many single-stage setups. Multi-stage systems, heat pumps with auxiliary heat, and humidifier/dehumidifier control generally need one. Run your system through Honeywell’s compatibility checker before buying if you have anything beyond a basic single-stage furnace and AC.

Room sensors: The included RCHT8612WF2 sensor pairs over Honeywell’s RedLINK wireless protocol, not standard Wi-Fi, so range and reliability tend to be solid even in homes with spotty Wi-Fi coverage in far rooms. You can add more sensors — the T9 supports up to 20 — and set priority modes: “Active Room” follows whichever sensor detects occupancy, or “Select Rooms” lets you average or prioritize specific sensors manually.

Installation: Expect 30–45 minutes for a DIY install with the in-app wiring wizard. It’s approachable for anyone comfortable with basic furnace wiring.

App & Ecosystem

The T9 connects to Amazon Alexa and Google Assistant, plus platform integrations including Samsung SmartThings, Logitech Harmony, and IFTTT. One caveat reviewers flagged: some third-party platforms only integrate the thermostat itself, not the room sensors, so sensor-based automations outside the Honeywell Home app may be limited. Apple HomeKit is not supported.

The Honeywell Home app handles scheduling, geofencing setup, and sensor priority management. It’s rated as reliable and straightforward by reviewers, if not quite as visually refined as ecobee’s app.

Geofencing and Room Sensors: The T9’s Real Advantage

Geofencing uses your phone’s location to detect when you’re away and adjusts the schedule automatically, which reviewers describe as one of the more seamless implementations in the category — it just works without much manual tuning. Combined with the room sensor system, the T9 is positioned by most reviewers as the strongest all-around option in Honeywell’s non-pro-install lineup, ahead of the T6 Pro and Sensi-tier competitors on comfort features, though still behind ecobee’s SmartSensor ecosystem in breadth of third-party integration.

Price & Value

Honeywell Home Lyric T9
Price (USD) ~$150–230
Included 1 RCHT8612WF2 room sensor
Warranty 2 years
Subscription required No
Additional sensors Sold separately, up to 20 supported

Compared to ecobee’s Enhanced (a similar price point with one sensor sold separately), the T9’s included sensor evens things out. Compared to the T6 Pro, you’re paying roughly $50–80 more for the sensor system and geofencing.

Pros & Cons

Pros:
– One of Honeywell’s most capable non-pro-install thermostats
– Included room sensor with support for up to 20
– Reliable, low-fuss geofencing
– Works with Alexa, Google Assistant, SmartThings, and IFTTT
– No C-wire needed in many single-stage setups

Cons:
– No Apple HomeKit support
– Some third-party platforms don’t integrate the room sensors, only the thermostat
– App is functional rather than best-in-class
– 2-year warranty, shorter than ecobee’s 3-year term

Honeywell Lyric T9 vs T6 Pro vs T10 Pro: features, price, and rebate eligibility compared

The Recommendation

Buy the Honeywell Home Lyric T9 if you want room-level comfort and reliable geofencing without ecobee’s price or Apple HomeKit dependence. If you don’t care about sensors, save money with the T6 Pro instead. If you have a large, zoned home and want a pro-installed system, look at the T10 Pro.

For a head-to-head against ecobee, see ecobee vs Honeywell: Feature & Price Breakdown.

Frequently Asked Questions

Does the Lyric T9 need a C-wire?
Not always. It works without one in many single-stage setups. Multi-stage systems, heat pumps with auxiliary heat, and humidifier/dehumidifier control typically need a C-wire.

How many room sensors does the T9 support?
Up to 20. It ships with one; additional sensors are sold separately.

Does the T9 work with Apple HomeKit?
No. No current Honeywell Home thermostat supports Apple HomeKit. ecobee remains the main major brand with native HomeKit support.

How does the T9 compare to the T6 Pro?
The T9 adds a bigger touchscreen, room sensors, and geofencing. The T6 Pro is cheaper and skips all three. If room-level comfort matters, the T9 is worth the extra cost.

Is the Lyric T9 a good match for a large home?
It handles multiple sensors well (up to 20), making it reasonable for larger homes, but for a heavily zoned system, the pro-installed T10 Pro offers more advanced zoning control.

Does the T9 support Google Assistant?
Yes, along with Amazon Alexa, Samsung SmartThings, Logitech Harmony, and IFTTT.