The short version: The Honeywell Home T5 (RTH8800WF, current revision RTH8800WF2022) is a simple touchscreen Wi-Fi thermostat with geofencing, priced below the T6 Pro and Lyric T9. The tradeoff is a hard requirement for a C-wire — there’s no power-stealing fallback like on the T6 Pro. Retailer and Consumer Reports coverage is generally positive on ease of use, with mixed feedback on smart-home connection reliability.

Who It’s For

The T5 fits Canadian forced-air homes — furnace, heat pump, or central AC — with a C-wire already in place or easy to add. It suits buyers who want a clean touchscreen interface and geofencing without paying for room sensors or zoning.

It’s not the right fit for older Canadian housing stock without a C-wire and no straightforward way to add one — check your furnace wiring before buying, since this is one of the few Honeywell retail models with no workaround. It’s also not for Apple HomeKit households, since no current Honeywell thermostat supports it.

Design & Build

The T5 has a large, clean touchscreen that reviewers consistently describe as intuitive, with clear temperature readouts and simple navigation. It’s less visually distinctive than ecobee or the Lyric T9, built for straightforward daily operation rather than as a design statement.

Setup & Compatibility (C-Wire Required)

C-wire situation: Unlike the T6 Pro or Lyric T9, the T5 requires a C-wire with no power-stealing fallback. Older Canadian homes without one will need an electrician or HVAC tech to run one before installing this model — or a different Honeywell model that tolerates more setups.

System compatibility: Works with standard forced-air furnaces, heat pumps, and central AC. Run your system through Honeywell’s compatibility checker before buying, especially for heat pump or dual-fuel setups.

App setup: Installation is generally described as easy with a guided in-app walkthrough, and Wi-Fi/account pairing is straightforward once the wiring is done.

App & Ecosystem

The T5 works with Amazon Alexa, Google Assistant, and Samsung SmartThings. Feedback is mixed: many reviewers report smooth integration, while some note occasional connectivity glitches, a common issue across budget Wi-Fi thermostats rather than specific to this model. There’s no Apple HomeKit support.

Scheduling covers a standard 7-day program, and the app is rated as easy to use for remote schedule and mode changes.

Geofencing

The T5 uses your phone’s location to detect when you’re away and adjusts temperature automatically, useful for Canadian households heading to a cottage or away for a stretch in winter without wanting to leave the heat running at full schedule. Geofencing typically appears on pricier thermostats, so its inclusion here is a genuine value point.

Price & Value

Honeywell Home T5 (RTH8800WF)
Price (CAD) ~$150–200
Warranty 2 years
Subscription required No
C-wire required Yes, no exceptions

The T5 is ENERGY STAR certified, the baseline most Canadian utility and provincial rebate programs check for. See Smart Thermostat Rebates in Canada by Province for current program details, since exact eligibility varies by province.

Pros & Cons

Pros:
– Clean, intuitive touchscreen interface
– Geofencing included at a budget price point
– Works with Alexa, Google Assistant, and SmartThings
– Straightforward installation when a C-wire is present
– ENERGY STAR certified

Cons:
– C-wire required, no workaround
– Mixed feedback on smart-home connection reliability
– No room sensors or zoning
– No Apple HomeKit support
– 2-year warranty

Honeywell T5 vs T6 Pro vs Lyric T9: features, price, and C-wire requirements compared

The Recommendation

Buy the Honeywell Home T5 if you already have a C-wire and want a clean touchscreen with geofencing at a lower price than the T6 Pro or Lyric T9. If you’re unsure about your wiring, get the T6 Pro instead — it works without a C-wire in more configurations.

For a broader C-wire comparison, see Emerson Sensi vs Honeywell T5: Which Wins for C-Wire Required Systems in Canada.

Frequently Asked Questions

Does the Honeywell T5 (RTH8800WF) require a C-wire?
Yes. Unlike the T6 Pro, there’s no power-stealing workaround. If you don’t have a C-wire, plan for an electrician or HVAC tech, or choose a different model.

Does the T5 support Apple HomeKit?
No. No current Honeywell Home thermostat supports Apple HomeKit.

Is the T5 eligible for Canadian rebates?
It’s ENERGY STAR certified, the baseline requirement for most provincial and utility programs, but exact eligibility varies. Check Smart Thermostat Rebates in Canada by Province before assuming a specific rebate applies.

Is the T5 the same as the T6 Pro?
No. The T5 requires a C-wire but costs less; the T6 Pro works without one in many setups and costs more. Neither includes room sensors.

Does the T5 have geofencing?
Yes, a genuine advantage at this price point, since geofencing is more commonly reserved for pricier thermostats.

Where can I buy the T5 in Canada?
Amazon.ca and Home Depot Canada.