Dual-fuel heating — keep the gas furnace, add a heat pump
A dual-fuel system pairs an electric heat pump with your gas furnace. The heat pump does the work in mild weather — which in Vancouver is most of the year. When it gets genuinely cold, or when it becomes cheaper to burn gas, the system switches to the furnace automatically.
You get efficient electric heating for most of the season, gas backup for the cold snaps, air conditioning in summer, and — for many households — the largest rebates available in BC.
Installed cost typically $14,000–$24,000 before rebates. For a lot of Vancouver homes it's the most sensible heating decision available right now, and almost nobody local is explaining it.
How it actually works
Two heat sources, one control system.
The heat pump runs as the primary. It's efficient in mild conditions — it moves heat rather than making it, so it delivers several units of heat per unit of electricity. Vancouver spends most of its heating season in exactly that range.
When the outdoor temperature drops past a set point — the switchover point — the system hands over to the gas furnace. Below that threshold the heat pump's efficiency falls and gas becomes the better option, both for capacity and cost.
The switchover happens automatically. You don't manage it.
Setting the switchover point — the part that matters
This is where a dual-fuel system is either excellent or mediocre, and it's the thing most installers set once and forget.
The switchover can be set by temperature (simple — below -5°C, run gas) or by economic balance point — the outdoor temperature at which gas actually becomes cheaper than electricity for your rates. The economic point is the better setting and it moves when energy prices move.
We calculate yours based on your actual rates and your home's heat loss, set it, and explain how to have it revisited if rates change materially. A system set to a generic default is leaving money on the table every winter.
Why this suits Vancouver specifically
Our winters are mild. Vancouver spends the large majority of its heating hours in the range where a heat pump is at its most efficient. The furnace is genuinely a backup here, not a co-primary — unlike in Calgary or Winnipeg.
Cold snaps still happen. Arctic outflow events drop us well below normal for days at a time. That's exactly when a heat-pump-only house strains and when having gas is reassuring.
Summers have changed. Cooling has moved from luxury to something people plan for. Dual-fuel includes it.
Dual-fuel vs. going all-electric
Honest comparison, because both are defensible:
If your priority is the lowest possible carbon footprint, all-electric is the honest recommendation and we'll say so. If your priority is resilience, cost control and a house that stays warm in an outflow event, dual-fuel is usually the better engineering answer. If your furnace is only a few years old, dual-fuel lets you keep it and add the heat pump, which is meaningfully cheaper than replacing both.
- Cold snap performance
- Gas furnace handles it comfortably
- Poorly insulated home
- More forgiving
- Electrical service
- Usually no panel upgrade needed
- Carbon footprint
- Lower than gas-only, higher than all-electric
- Upfront cost
- $14,000–$24,000
- Rebates
- Substantial, including gas-utility programs
- Uses your existing furnace
- Yes if it's sound — reduces cost
- Running cost
- Optimised between two fuels
- Cold snap performance
- Cold-climate units cope; capacity tightens in extremes
- Poorly insulated home
- Can struggle
- Electrical service
- May need $2,000–$5,000 upgrade
- Carbon footprint
- Lowest
- Upfront cost
- $12,000–$20,000
- Rebates
- Substantial, different programs
- Uses your existing furnace
- No
- Running cost
- Single fuel, rate-exposed
Dual-fuel systems are among the better-supported upgrades in BC, with programs from FortisBC and provincial CleanBC streams. Amounts are significant enough to change the economics of the whole project.
Two things worth knowing before you get quotes: several programs require the contractor to be registered with the Home Performance Contractor Network at the time you're quoted — not at installation — so being quoted by an unregistered contractor can disqualify you. And programs change with the fiscal year.
Ask us what's live for your home before you start collecting quotes.
What installation involves
Heat loss calculation and heat pump sizing · Assessment of your existing furnace — age, efficiency, whether it's worth keeping · Outdoor unit placement, considering noise and neighbours · Indoor coil integrated with the existing ductwork · Dual-fuel-capable thermostat and controls — the piece that manages switchover · Electrical, and a panel check · Refrigerant lines and condensate · Commissioning, switchover configuration and balancing · Permits and inspection · Rebate documentation
Typical duration: 2–3 days.
Can I keep my existing furnace?
Usually, if it's under about 12–15 years old, in sound condition, and its controls can integrate with a dual-fuel thermostat. That's the cheapest route into dual-fuel by a distance.
If your furnace is near end of life, replacing both at once still often beats doing them separately — one set of permits, one install, one disruption.
We'll assess yours and tell you which.
What it costs
Before rebates. · Financing
- Heat pump added to a sound existing furnace
- $10,000–$16,000
- Full dual-fuel, new heat pump and new furnace
- $14,000–$24,000
- Dual-fuel thermostat and controls
- included
