If your furnace is approaching the end of its life or you’re planning a heating upgrade, you’re choosing between three options: replace the furnace with a new gas furnace, switch to a heat pump, or pair the two as a dual-fuel system.
For most Fraser Valley homeowners, a heat pump - sometimes paired with the existing furnace as a dual-fuel system - is the stronger 15-year decision. Heating costs come down. You get cooling included. Resale value goes up. And the climate here suits a heat pump well.
That said, a furnace still wins in specific situations. This guide walks through the side-by-side so you can make the call with real numbers, not marketing claims.
How each system actually heats
The two systems work on different principles. That difference is the root of every other comparison below.
A gas furnace burns natural gas inside a sealed combustion chamber. Heat is transferred to the air, then a blower pushes warm air through your ducts. Combustion gases vent outside through a flue.
A heat pump doesn’t burn anything. It uses refrigerant and a compressor to move heat from outside air into your home. In summer, the cycle reverses - the same system pulls heat out of the house and acts as your air conditioner.
This single difference is why a heat pump replaces both a furnace and an AC in one piece of equipment, while a furnace only handles heating.
Heating performance side-by-side
A high-efficiency gas furnace produces a lot of heat fast. Air comes out of the registers warm - typically 50–60°C. A heat pump puts out cooler air, around 35–45°C, but runs longer at lower speeds.
The practical experience is different but not worse:
Furnace: short bursts of hot air, then off. The house heats up quickly but you feel temperature swings.
Heat pump: continuous low-speed warm air. Steady temperature, more even distribution, less “blast and stop” feel.
Most owners switching from a furnace to a heat pump notice the home feels more comfortable, not less - because the temperature stays stable rather than swinging 2–3 degrees between cycles.
In our climate, a properly sized cold-climate heat pump heats a Fraser Valley home through a normal winter without falling behind. We’ve covered that in detail in our Fraser Valley winter performance guide.
Cooling - included or extra
A heat pump cools your home in summer. A gas furnace doesn’t.
If you have an aging furnace and no central air conditioning, choosing a furnace replacement means buying a furnace and an AC unit if you want cooling - two systems, two installs, two pieces of equipment to maintain.
A heat pump is one system that does both. With Fraser Valley summers trending hotter and longer (the 2021 heat dome reset what “summer” looks like here), cooling is no longer optional for most homeowners. That alone shifts the math toward a heat pump.
Operating cost in BC - the real comparison
This is where the numbers matter. Operating cost depends on three things: equipment efficiency, fuel price, and your home’s heat load.
What you’re paying per unit of heat
Natural gas (FortisBC residential): roughly $1.30–1.50 per gigajoule, plus delivery and carbon tax - totaling $14–18/GJ depending on rate tier and time of year. A 96% efficient furnace converts that into about 920 MJ of usable heat per GJ.
Electricity (BC Hydro residential): roughly $0.10–0.15 per kWh depending on tier. A heat pump with a seasonal COP around 3 produces 3 kWh of heat per 1 kWh of electricity used.
Run those numbers and a heat pump in the Fraser Valley typically costs 30–50% less to operate than baseboards or oil - and is often comparable to or slightly less than a high-efficiency gas furnace, especially after carbon tax increases continue to push gas prices up.
The cleaner picture:
Existing system | Typical operating-cost change with a heat pump |
|---|---|
Electric baseboards | 50–70% lower |
Oil furnace | 40–60% lower |
Old natural gas furnace (80% AFUE) | 20–40% lower |
New high-efficiency gas furnace (96% AFUE) | Comparable to slightly lower; widening gap as carbon tax rises |
Your specific number depends on the home and the system. The Home Energy Assessment is where we work it out.
Up-front cost vs. lifetime cost
Up-front, a heat pump install costs more than a furnace replacement. The gap shrinks fast once rebates and operating costs are factored in.
Gas furnace replacement: typically $5,000–$8,000 installed (no AC included)
Cold-climate heat pump: typically $10,000–$16,000 installed (heating + cooling)
BC heat pump rebates: up to $11,000 stacked across Greener Homes, CleanBC, and utility programs (we cover this in detail in our BC heat pump rebate guide)
Net-of-rebates, the price gap often closes to under $2,000 - and that’s before counting either the AC unit you’d add to a furnace install or the lower monthly bills the heat pump delivers over 15 years.
Lifespan and maintenance
Both systems run 12–20 years with proper maintenance. Real-world averages:
Gas furnace: 15–20 years
Heat pump: 12–15 years (the outdoor unit is exposed to weather; the indoor air handler often lasts longer)
Maintenance for both is similar - annual professional service, regular filter changes. Furnaces need combustion safety checks (carbon monoxide, flue draft). Heat pumps need refrigerant level and outdoor coil checks. Cost is roughly comparable per visit.
At a glance
| Heat pump | Gas furnace |
|---|---|---|
Provides heating | Yes | Yes |
Provides cooling | Yes | No |
Operating cost (Fraser Valley) | Low | Low–medium, rising with carbon tax |
Up-front cost | Higher | Lower |
Net cost after rebates | Often comparable | No major rebates |
Lifespan | 12–15 years | 15–20 years |
BC climate fit | Strong (cold-climate models to -25°C) | Strong |
Carbon footprint (BC grid) | Low | Higher |
Resale impact | Positive (electrification) | Neutral |
When a furnace still wins
A heat pump isn’t always the right answer. A furnace replacement makes more sense when:
Your existing furnace is recent (under 10 years) and your AC is what failed - replace just the AC
Your electrical panel can’t support a heat pump and a service upgrade isn’t feasible
The home is rarely heated (a seasonal cabin used a few weekends a year)
You want a heating system that runs through power outages and you don’t want generator backup
For most main-residence homes in Chilliwack, Abbotsford, or Langley, none of those apply.
Dual-fuel - the best-of-both option
If you’ve already got a working gas furnace and decent ductwork, a dual-fuel system is often the strongest play. Here’s how it works:
The new heat pump becomes your primary heating system
The existing furnace stays in place as backup
A smart thermostat decides which runs based on outdoor temperature
In Fraser Valley winters, the heat pump runs the vast majority of the time
During the rare cold snap (below -5°C, or whatever threshold you set), the furnace takes over
You get heat pump efficiency for 90%+ of the season, gas furnace headroom for the worst nights, and you keep your existing equipment as redundancy. It’s not the cheapest option up front, but it’s often the lowest-risk path for homes already on natural gas.
What this means for your home
The right answer depends on what you’re heating with now and what shape your home is in:
Coming off baseboards or oil: heat pump, full stop. The savings are dramatic.
Replacing an old gas furnace and don’t have AC: strongly consider a heat pump or dual-fuel - you get cooling included and the operating-cost gap keeps narrowing.
Replacing a recent furnace with working AC: a heat pump may still make sense, but the case is closer.
Already have a working furnace and want efficiency + cooling: dual-fuel is the cleanest answer.
We don’t push one option over another. The Home Energy Assessment gives us the load math and your fuel costs; the recommendation comes out of that.
FAQ
Can I keep my furnace as backup with a new heat pump?
Yes - a dual-fuel setup pairs a new heat pump with your existing gas furnace. The heat pump handles most of the heating year. The furnace takes over below a temperature threshold you choose. You get heat pump efficiency in mild weather and gas furnace performance during cold snaps, with full redundancy.
What happens during a power outage?
Both systems need electricity. A modern furnace needs power for its blower, ignition, and controls - even with gas as the fuel, it won’t run without power. A whole-home generator covers either system if outage backup matters to you.
Is my electrical panel ready for a heat pump?
Most heat pumps need a 30–50A 240V circuit. Older homes with 100A service may need a panel upgrade. We check panel capacity during the Home Energy Assessment, before any pricing - no surprises mid-install.
Is gas going away in BC?
The province has signaled long-term direction toward electrification, and carbon tax increases are pushing gas prices up year over year. Existing gas connections aren’t being removed, but new construction in some municipalities now requires heat pumps. For homeowners staying in their home 10+ years, the trend favors heat pumps.
How loud is each system?
Heat pumps run quieter day to day - typically 50–60 dB at the outdoor unit, comparable to a refrigerator, with a continuous low-speed indoor blower. Furnaces are quiet between cycles but produce a noticeable burner-and-blower sound when they fire up. Most owners find a heat pump’s continuous quiet hum less intrusive than a furnace’s start-stop pattern.
Will switching to a heat pump improve my home’s resale value?
A heat pump adds central air conditioning to a home that didn’t have it, which is the single biggest factor on resale comfort. It also marks the home as electrified, which is increasingly relevant to BC buyers. Realtors in the Fraser Valley consistently report stronger interest in heat pump-equipped homes than gas-only ones.
Cohesive Mechanical is the Fraser Valley’s trusted HVAC and plumbing experts - based in Chilliwack, serving Abbotsford, Langley, and the Lower Mainland since 2017. Done right the first time. Clean installs. Clear communication.
Want a clear recommendation for your home? Book a free quote and we’ll run the numbers with you. Learn more about our heat pump installations or furnace repair and replacement.
