The GTA Homeowner's
Heat Pump Buyer's Guide.
How heat pumps work, types, efficiency ratings, Ontario rebates, costs, and which brands are actually worth it.
How Does a Heat Pump Work?
This GTA homeowner's heat pump buyer's guide covers how cold-climate heat pumps work in Ontario's climate, Ontario HRSP rebates up to $7,500, sizing for Toronto winters, and the brands we install after years in the field.
A heat pump doesn't generate heat — it moves it. In winter, it extracts heat from outdoor air (even in cold weather) and transfers it inside. In summer, it reverses and works like an air conditioner, pulling heat out of your home. A thermostat signals when to turn on and off.
Modern cold-climate heat pumps are a viable primary heating source in the GTA. They run on electricity, so they produce zero on-site emissions — a major advantage as Ontario pushes toward electrification. The nuance on cold-weather performance lives in the sizing section below.
Heat pumps are the fastest-growing HVAC category in Ontario, driven by government rebates and rising gas prices. They typically last 15–20 years and can cut heating costs by 30–50% compared to a gas furnace, depending on electricity rates.
When Should You Consider a Heat Pump?
A heat pump can make sense as a replacement for an aging furnace or AC, or as an add-on to your existing system. Here's how we think about it:
- ✕ Furnace or AC is 12+ years old
- ✕ You want to reduce gas consumption
- ✕ Your home has ductwork already
- ✕ You want both heating AND cooling
- ✕ You want to take advantage of rebates
- ✓ Your furnace is under 5 years old
- ✓ You have no ductwork (unless going ductless)
- ✓ Your electricity rates are very high
- ✓ Your home has poor insulation (fix that first)
- ✓ You only need cooling (a standard AC is cheaper)
Need help deciding? Book a consultation — our technicians will assess your home and give you an honest recommendation.
Two Types of Heat Pump Setups
For ducted heat pumps, there are two configurations. The right choice depends on whether you want to keep your gas furnace or go fully electric.
Dual Fuel (Heat Pump + Furnace)
A heat pump paired with your existing gas furnace. The heat pump handles mild weather efficiently; the furnace kicks in on the coldest days. Best of both worlds — maximizes savings without sacrificing comfort.
- Uses your existing furnace as backup
- Automatically switches between electric and gas
- Lowest operating cost in mixed climates
- Eligible for Ontario rebates
- Easiest upgrade for most GTA homes
Air Handler + Electric Backup
A heat pump paired with an air handler and electric heat strips instead of a gas furnace. Fully electric — no gas line needed. The heat strips handle the coldest days when the heat pump can't keep up alone.
- 100% electric — no gas required
- Air handler replaces the furnace
- Electric heat strips for extreme cold
- Ideal for homes going fully off gas
- Higher electricity bills on coldest days
Per zone (1–5 zones) for most GTA homes: ducted air-source heat pump paired with your existing furnace (hybrid setup). Best bang for the buck. See our heat pump options →
Going fully electric? We're bringing in Midea air handlers with integrated electric backup — this is the all-electric configuration (heat pump + air handler + electric heat strips, no gas furnace in the loop) that qualifies for the top-tier HRSP rebate of up to $7,500 for electric-heated homes switching to an ASHP.
The R-410A → R-454B Switch (Why It Matters Now)
As of January 1, 2025, all new residential heat pump production in the US and Canada moved to lower-GWP A2L refrigerants — primarily R-454B (and R-32 on some ductless lines). R-410A — the refrigerant in virtually every system installed over the last 15+ years — is being phased out.
What this means if you're buying in 2026:
- Most new systems on the market are R-454B. R-410A inventory is still being installed from warehouse stock, but manufacturing stopped over a year ago. Expect R-410A refrigerant prices to climb as supply tightens — a repeat of what happened with R-22.
- A2L is mildly flammable (class A2L). Safe when installed correctly, but the install rules are stricter — charge limits, leak detection, brazing procedures. Your installer needs to be HRAI-certified and trained specifically on A2L handling.
- Don't replace a working R-410A system just for this. If your equipment is 8–12 years old and running fine, keep it. The transition matters at normal end-of-life (12–15+ years), not before.
- Matched coils and condensers. Mixing R-410A and R-454B components isn't allowed. If you're replacing just the outdoor unit on an older system, the indoor coil usually has to go too — factor this into any "just fix the compressor" quotes you're considering.
H&C is HRAI-certified and every tech on our trucks is trained and tooled for A2L refrigerants. We won't quote you an R-410A system in 2026 unless you specifically ask — the warranty and parts trajectory just isn't there anymore.
Getting the Right Size Heat Pump
An oversized heat pump short-cycles and wastes energy. An undersized one can't keep up on the coldest days and relies too heavily on backup heating. Proper sizing matters more than brand.
Heat pumps are measured in tons of cooling/heating capacity (1 ton = 12,000 BTU). They're also rated in BTUs (British Thermal Units) of heating output. The right size depends on your home's square footage, insulation, windows, ceiling height, and orientation.
The cold-climate reality: Modern cold-climate heat pumps rated to -25°C typically deliver around 75% of rated capacity at -15°C and ~50% at -25°C, with a COP near 1.8 at those temperatures. Toronto's 99% winter design temp is -22°C, so sizing for that benchmark matters — a unit that's "rated to -25°C" on paper will only put out half its nameplate BTUs at that temperature. This is why dual-fuel (heat pump + existing furnace) and air-handler-with-electric-backup configurations exist: to cover that capacity gap on the coldest handful of days a year.
These are estimates only. A proper heat-loss calculation considers insulation, windows, and air leakage.
Technician installing heat pump outdoor unit
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An oversized heat pump cycles on and off too frequently, reducing efficiency and comfort. An undersized one runs constantly on the coldest days without reaching temperature.
We do a proper Manual J heat-loss calculation for every installation — not a guess based on square footage.
Understanding SEER2 & HSPF Ratings
SEER2 (Seasonal Energy Efficiency Ratio) measures cooling efficiency — higher is better. HSPF (Heating Seasonal Performance Factor) measures heating efficiency. Unlike gas furnaces that use AFUE, heat pumps use these two ratings because they both heat and cool. A higher number means better efficiency and lower operating costs.
For the Ontario Home Renovation Savings Program (HRSP), the unit has to be on NRCan's qualified products list — which in practice means cold-climate certified. Most cold-climate heat pumps sold today meet the threshold. See the rebates section below for the specifics.
GTA math: If you're switching from a gas furnace to a heat pump, you'll use about 30–50% less on heating costs. On a typical $2,000/year heating bill, that's roughly $600–$1,000/year in savings.
How Heat Pumps Handle GTA Cold
Every heat pump loses some heating capacity as the outdoor temperature drops — that's physics, not a defect. The real question is how much it loses and how fast. A standard heat pump drops off steeply below freezing; a cold-climate certified (CCASHP) unit holds its output deep into negative temperatures.
Illustrative only. Actual curves vary by brand, model, and refrigerant. Cold-climate certified units hold capacity far better than standard units once temperatures go below freezing — that's the whole point of the certification. We provide the manufacturer's AHRI-rated spec sheet with every quote.
Your home has a heat-loss curve of its own — the colder it gets outside, the more heat the house needs to hold setpoint. Where your home's demand line crosses the heat pump's capacity line is your balance point. Above it, the heat pump alone is enough. Below it, backup heat (a gas furnace or electric heat strips) picks up the remainder.
Toronto's 99% winter design temperature is -22°C — only about 1% of winter hours drop below that in a typical year. The real sizing question isn't whether your heat pump works on an average January day. It's whether the whole system (heat pump + whatever backup you choose) handles the coldest handful of hours.
Midea EVOX G3
For most GTA homes, the Midea EVOX G3 is our default quote. It's one of the strongest cold-climate performers on the market in 2026 — delivering rated heating capacity down to -25°C and still running at -30°C. Performance-wise it sits in the same tier as Mitsubishi's flagship Zuba-Central line, at roughly half the installed cost. It also outperforms most of the standard central heat pumps we see quoted elsewhere.
- ✓R-454B refrigerant — future-proof past the 2025 R-410A phase-out
- ✓NEEP-listed cold-climate (CCASHP) certified
- ✓ENERGY STAR Most Efficient — exceeds CEE Advanced Tier
- ✓On NRCan's qualified products list — full HRSP rebate eligible
We'll also walk you through how the alternatives (Mitsubishi, ProAir, Kinghome) compare against your specific home. No pressure — just the data.
How Much Does a Heat Pump Cost?
The total cost of a heat pump installation includes the unit, labour, permits, and any electrical or ductwork modifications. Here's what GTA homeowners typically pay in 2026:
Financing available: We offer monthly payment plans through Financeit. Many GTA homeowners pay $80–$120/month for a new heat pump — less than the energy savings it provides. Call for details.
What It Costs to Run in Ontario
Sticker price is one thing; the monthly electricity bill is another. Running cost depends on which electricity plan you're on and how you use your thermostat. Every Ontario homeowner is on one of three plans, and you can switch with a phone call to your utility — no fees, effective the next billing cycle.
Time-of-Use (TOU)
Price changes by time of day. Off-peak overnight and weekends is cheapest. On-peak weekdays 4–9pm (winter) is most expensive — which is exactly when everyone comes home and bumps the thermostat.
- Off-peak (nights, weekends): cheapest
- Mid-peak (shoulders): moderate
- On-peak (weekday 4–9pm): most expensive
- Most Ontario homes default to this
Ultra-Low Overnight (ULO)
Overnight (11pm–7am) is dirt cheap — a fraction of TOU's off-peak. But weekday on-peak is more expensive than TOU's on-peak. The math depends entirely on your thermostat habits.
- Overnight: cheapest rate available
- Weekend / mid-peak: moderate
- On-peak: higher than TOU's on-peak
- Good if you run steady, bad if you deep-setback at night
Tiered
A single flat rate up to a monthly threshold; higher above it. No time-of-day pricing. The winter threshold is raised to accommodate electric heating.
- Simple — no schedule to manage
- Winter threshold built in for electric heat
- Usually pricier than TOU or ULO if you heat with electricity
- Best for very low-usage homes
There's no one-size-fits-all best plan. It depends on how you actually use your thermostat:
- If you setback at night (cooler for sleep, warm up in the morning — most people): TOU is probably your best bet. ULO punishes the 4–9pm catch-up when the heat pump has to drag the house back up to daytime temps.
- If you run steady temperatures day and night: ULO usually beats TOU meaningfully thanks to the overnight rate.
- If you heat primarily with gas (dual-fuel systems leaning on the furnace in winter): plan choice matters less; TOU is fine.
Switching takes one call to your local utility (Toronto Hydro, Alectra, Hydro One, Oakville Hydro, etc.). Try TOU first if you're unsure, then reassess after a full winter.
Dual-Fuel Switchover Logic
On a hybrid (heat pump + gas furnace) system, the thermostat is programmed with a switchover temperature. Above that outdoor temp, only the heat pump runs. Below it, only the furnace runs. This isn't a performance limit — it's an economic crossover, the temperature at which natural gas becomes cheaper per BTU of delivered heat than electricity.
The crossover shifts by several degrees depending on your electricity rate plan, your Enbridge gas rate, and how well-insulated your home is. In GTA in 2026, most installers land somewhere between -5°C and -10°C for a TOU-plan home — colder for ULO homes that can lean on cheap overnight power, warmer for homes on Tiered.
A switchover set too warm means the gas furnace kicks on when the heat pump would've been cheaper. Set too cold, and the heat pump runs when gas would've been cheaper. Either direction quietly costs you money every month. Ask your installer to do the math for your specific home and rate plan — and ask again if your utility rates change.
Where the Rebate Money Actually Is
Quick context, because this has changed. The federal Canada Greener Homes Grant wound down in early 2024 and is no longer accepting new applications. The Enbridge HER+ program closed to new applicants in February 2024. If you're reading a competitor's site that cites either of those — it's out of date.
What's active in 2026 is the Ontario Home Renovation Savings Program (HRSP), delivered by Save on Energy and Enbridge Gas. It runs through November 2026.
- Cold-Climate Air-Source Heat Pump: up to $7,500. Exact amount varies by heat pump capacity and your current heating fuel. Electric-heated homes typically qualify for the upper tier (near the full $7,500) because switching to a heat pump cuts more emissions. Gas-heated homes receive a smaller, capacity-based amount.
- Ground-Source (Geothermal) Heat Pump: up to $12,000.
- Heat Pump Water Heater: up to $500 (ENERGY STAR models may qualify for higher tiers).
No pre-install energy audit required for single-measure upgrades — that's a change from the old Greener Homes process, and it saves homeowners roughly $400–$700 in upfront assessment fees. Audits are only needed if you're bundling a heat pump with insulation, windows, or air-sealing to stack additional bundle rebates.
Currently on oil heat? The federal Oil-to-Heat-Pump Affordability Program (OHPA) is still active and offers up to $10,000–$15,000 for an oil-to-ASHP conversion. In some cases you can stack OHPA with HRSP.
The catches that trip homeowners up:
- The unit must be on NRCan's qualified products list. We only quote models that are.
- The installer must be program-registered. H&C is — ask us for our registration number if you want to verify.
- Program amounts and eligibility shift. We calculate your specific rebate in writing before you sign anything.
Heat Pump Brand Comparison: Our Honest Take
We install and service every major heat pump brand. Here's our honest take after years of installations:
We quote and install four heat pump lines — the ones that actually hold up in GTA winters at a price point our customers can stomach. Here's the honest breakdown.
We also service Daikin, Carrier, Bryant, Trane and York — we just don't install them new. Parts availability and pricing on those lines don't currently justify the install-side premium for most GTA homeowners.
Brand matters less than proper sizing, quality installation, and regular maintenance. See our heat pump options →