The short version: Worth knowing before you buy: the Honeywell T4 Pro (TH4110U2005) is not a Wi-Fi or app-controlled thermostat. It’s a battery- or C-wire-powered programmable thermostat with push-button controls, no smartphone app, and no Alexa/Google support. If you’re searching for a “smart” T4 Pro, Honeywell doesn’t sell one under this name — the closest genuinely connected model in the lineup is the T6 Pro. Honeywell has also confirmed the T4 Pro is being phased out in favor of the newer FocusPro series.

We’re including this review because the T4 Pro is still stocked at Home Depot Canada and sold on Amazon.ca, and shoppers searching “Honeywell T4 Pro” deserve an accurate answer rather than an assumption that it’s Wi-Fi-enabled.

Who It’s For

The T4 Pro suits buyers who specifically want a simple, non-connected programmable thermostat: landlords who don’t want tenants adjusting app settings, buyers replacing a broken thermostat who don’t need remote access, or households that want to skip Wi-Fi pairing and app accounts entirely. It’s often sold in a 2-pack, useful for rental properties or multi-unit buildings, common in Canadian rental markets.

It’s explicitly not for anyone who wants remote control, voice assistant integration, or geofencing. For that, look at the Honeywell T6 Pro, X2S, or Lyric T9 — all genuinely Wi-Fi-connected and in a similar or only slightly higher price range.

Design & Build

The T4 Pro has a backlit blue display (3.93 sq. in.) with push-button and soft-key navigation rather than a touchscreen. It’s compact and utilitarian, built to be installed and left alone. Build quality matches Honeywell’s reputation for durable, unglamorous hardware.

Setup & Compatibility

Power: Runs on 2 AA batteries or C-wire power, genuinely flexible since it doesn’t require a C-wire the way some Wi-Fi Honeywell models do — useful in older Canadian homes without one already run.

System compatibility: Supports 1 heat/1 cool conventional systems (gas, oil, electric) or 1 heat/1 cool heat pump systems without auxiliary/emergency heat. It doesn’t support multi-stage or dual-fuel systems, a real limitation for Canadian homes increasingly running a heat pump alongside a gas furnace for cold-weather backup — check your equipment before buying.

Programming: Offers 7-day, 5-2, 5-1-1, or non-programmable scheduling, set directly on the unit. Retailer reviews describe installation as generally easy, with the on-device programming interface taking a bit of getting used to compared to an app.

No App, No Voice Assistants

This is the section that matters most: the T4 Pro has no companion app, no Wi-Fi radio, and no Alexa, Google Assistant, or Apple Home integration. Everything is set on the device itself. If ecosystem integration is part of why you’re comparing smart thermostats, this isn’t that product, regardless of how it appears on some retail listings.

Price & Value

Honeywell T4 Pro
Price (CAD) ~$140–180 (often sold in a 2-pack)
Warranty 2 years (typical for the line)
Wi-Fi / app / voice control None
Being phased out Yes, replaced by Honeywell’s newer FocusPro series

For the price of a T4 Pro 2-pack, a single T6 Pro or X2S gets you genuine Wi-Fi control for one zone. The T4 Pro only makes sense if non-connected operation is a feature for you, not a limitation.

Pros & Cons

Pros:
– Reliable, simple, no ongoing app or account management
– Works on battery power, no C-wire required
– Often sold in a 2-pack, useful for rental units
– Straightforward for tenants or less tech-comfortable users

Cons:
– No Wi-Fi, app, or voice assistant support of any kind
– Doesn’t support multi-stage or dual-fuel systems
– Being discontinued in favor of Honeywell’s FocusPro line
– Not eligible for most smart thermostat rebate programs since it isn’t Wi-Fi connected — verify eligibility before assuming otherwise

Honeywell T4 Pro (non-connected) vs T6 Pro vs X2S: features, price, and connectivity compared

The Recommendation

Buy the Honeywell T4 Pro only if you specifically want a non-connected, no-app programmable thermostat — for a rental property, a simple system swap, or a household that doesn’t want smartphone control. If you want any remote access, Alexa/Google support, geofencing, or a rebate that typically requires Wi-Fi connectivity, get the Honeywell T6 Pro or X2S instead.

For the connected alternative, see Honeywell Home Thermostat Lineup: Which Model Should You Buy?

Frequently Asked Questions

Does the Honeywell T4 Pro connect to Wi-Fi?
No. Despite showing up in “smart thermostat” searches, the T4 Pro (TH4110U2005) has no Wi-Fi radio, no app, and no voice assistant support. It’s a battery- or C-wire-powered programmable thermostat controlled entirely on the device.

Is the T4 Pro eligible for Canadian utility rebates?
Most provincial and utility smart thermostat rebate programs require Wi-Fi connectivity and ENERGY STAR-certified smart thermostat status. Since the T4 Pro isn’t Wi-Fi connected, verify directly with your utility before assuming it qualifies — see Smart Thermostat Rebates in Canada by Province.

What’s the difference between the T4 Pro and T6 Pro?
The T6 Pro is Wi-Fi connected with Alexa support and an app. The T4 Pro has neither — it’s a basic on-device programmable thermostat. If you want any smart features, buy the T6 Pro.

Does the T4 Pro work with a heat pump?
It supports 1 heat/1 cool heat pump systems without auxiliary or emergency heat. It doesn’t support multi-stage or dual-fuel setups.

Is the T4 Pro being discontinued?
Yes, Honeywell is phasing it out in favor of its newer FocusPro series, which includes both non-programmable and Wi-Fi-connected options.

Where can I buy the T4 Pro in Canada?
Amazon.ca and Home Depot Canada, generally in a 2-pack.