The Honeywell Home T9 is the best smart thermostat for larger Canadian homes with multiple rooms — its optional Smart Room Sensors detect which rooms are actually occupied and adjust heating/cooling accordingly, preventing the common problem of heating an empty basement while the living room gets ignored. Works with Alexa, Google, and Apple HomeKit.
“"Two-story house with very different temperatures on each floor — the room sensors fixed a 10-year heating problem."”
Source: Reddit r/smarthome CanadaCollected in an earlier pass; not linked to a source thread.
“"Works with both Alexa and Google, which is a must for our house — not everyone uses the same app."”
Source: Verified Amazon.ca buyerCollected in an earlier pass; not linked to a source thread.
“"The occupancy detection is surprisingly accurate — only heats the rooms where people actually are."”
Source: Reddit r/homeautomation CanadaCollected in an earlier pass; not linked to a source thread.
Room sensor connectivity drops intermittently — requires frequent re-pairing
The wireless room sensors that enable the T9's multi-room comfort tracking lose connection to the base thermostat, particularly when separated by walls or multiple floors; re-pairing is the common fix.
Source: r/smarthome, Amazon CA reviewsCollected in an earlier pass; not linked to a source thread.Resideo app is unintuitive and slow compared to ecobee and Nest apps
The companion Resideo app has a cluttered interface and slower response time than competitor apps; users who switch from Nest or ecobee find the UX is a step back.
Source: r/smarthome, Amazon CA reviewsCollected in an earlier pass; not linked to a source thread.Geofencing is imprecise — home/away detection triggers incorrectly
The T9's geofencing for automatic away mode uses phone location but frequently fails to trigger correctly, running heat or AC when nobody is home or switching to away mode prematurely.
Source: r/smarthome, r/HoneywellCollected in an earlier pass; not linked to a source thread.Only 3 owner mentions have been collected for the T9 so far, all negative — two describe the thermostat reverting to factory settings after a firmware update, and one describes installation trouble that blew a furnace fuse. Three reports aren't enough to call this a systemic reliability issue; treat this as directional, not a verdict.
