Adding a heat pump to your gas furnace in Greater Victoria

What a dual-fuel system is, and why it is so common in Victoria

The typical Greater Victoria version: a gas furnace only a few years old, no air conditioning, and a homeowner who wants cooling for the heat-dome weeks more than a change in how the house is heated. Instead of a plain air conditioner, the installer fits a heat pump coil in the furnace plenum and a heat pump outdoor unit beside the house. The furnace blower moves the air for both, and a thermostat with an outdoor sensor decides which appliance runs.

For most of the year the heat pump does the work, because Victoria winters spend most hours between zero and ten degrees, where an air-source heat pump is efficient. The gas burner becomes a backup for the coldest mornings and for defrost cycles. In summer the same coil cools the house.

The heat pump side costs around $9,000–$16,000our estimate installed. That is a low-confidence estimate: no Greater Victoria installer publishes a dual-fuel price, so the site derives it from the ducted range less the furnace share. A full central ducted replacement runs $12,000–$22,000our estimate. Two quotes decide the real number.

Which rebates actually apply when you keep the furnace

Start with what does not apply. The non-income-tested CleanBC Home Renovation Rebate for gas-to-heat-pump switches is Northern BC only (north of and including 100 Mile House). Greater Victoria homes heated by gas, propane or oil are not eligible; only the income-tested Energy Savings Program applies.. The BC Hydro fall bonus (Level 1 / any-income examples — ductless-single: $1,000; ductless-multi: $1,000; central-ducted: $1,000) and the Home Renovation Rebate (Level 1 / any-income examples — ductless-single: $1,500; ductless-multi: $4,000; central-ducted: $4,000) are for homes whose main heat is electric; adding a coil to a gas furnace does not change the home's heating type.

What does apply is the CleanBC Energy Savings Program. Its requirements table for gas and propane homes (Level 1 / any-income examples — ductless-single: $5,500; ductless-multi: $11,000; central-ducted: $13,000) includes a separate dual-fuel ducted line, the one exception to the rule that the fossil-fuel system must be removed. That line is lower than the central-ducted line, and every dollar of it depends on income qualification (1 person: $51,100 / $63,900 / $102,100; 4 people: $94,900 / $118,600 / $189,800 (Level 1 / 2 / 3)) and an assessed-value cap ($1,200,000 (Level 1/2), $1,820,000 (Level 3)). You pre-register in the program portal, install with a registered contractor, and the contractor takes the rebate off the invoice.

FortisBC has advertised its own dual-fuel rebate. This site could not read the FortisBC program page on 2026-09-18, only search snippets, so no amount, deadline or condition from it is published here. Two things are still worth knowing: the Energy Savings Program rules list the FortisBC dual-fuel program as an alternative primary-heating rebate, so you take one or the other, and the snippets describe a maximum switchover-temperature setting for Vancouver Island systems. Ask the installer for FortisBC's current terms in writing before you sign, and keep the rebate out of your budget until you have seen them.

Switchover temperature: the setting that decides your bills

A dual-fuel thermostat has one number that matters more than any other: the outdoor temperature below which the furnace takes over. The capacity balance point is where the heat pump can no longer keep the house warm alone; a cold-climate unit pushes that far below anything Victoria normally sees. The economic balance point is where a unit of gas heat becomes cheaper than a unit of heat-pump heat, because the heat pump's efficiency falls with the temperature.

The economic point moves with rates. BC Hydro's tiered residential rate is 11.87¢/kWh for the first 675 kWh per month, then 14.08¢/kWh; basic charge 23.44¢/day, and FortisBC gas on Vancouver Island is $12.601/GJ total variable (delivery $8.469 + storage/transport $2.472 + gas $1.66); basic charge $0.4216/day; carbon tax $0. With the carbon tax gone, gas is cheaper per unit of energy than it was, which nudges the crossover toward a higher outdoor temperature than older rules of thumb. The operating-cost tool runs that comparison with current rates and your furnace's efficiency, and shows what moving the switchover a few degrees does to a winter's bill.

Installers here often leave the switchover between freezing and a few degrees below it, and the unverified FortisBC snippets describe a maximum setting near the top of that range. Get the number in writing and make sure you can adjust the thermostat yourself.

AHRI matching: the detail that quietly kills rebates

Rebate programs in BC do not pay on a brand or an outdoor unit alone. They pay on a matched combination, identified by an AHRI reference number, that appears on the BC Hydro and Better Homes qualified product list. For a dual-fuel job that combination is the outdoor unit, the indoor coil and the furnace blower together. If your furnace is not part of a listed combination with the proposed coil and outdoor unit, the lookup returns nothing and the application fails, even though the system heats fine.

This is the most common surprise on coil-on-furnace projects, because the furnace was chosen years ago by someone who never planned for a heat pump. Before you sign, ask for the AHRI reference number for your exact furnace model and see the listing on the qualified product lookup. If it does not exist, you are choosing between a different outdoor unit, a new furnace, or no rebate.

1. Write down the exact model number from your furnace rating plate.
2. Ask each installer for the AHRI reference number of the proposed coil, outdoor unit and your furnace as a set.
3. Check that number on the BC Hydro qualified heat pump lookup yourself.
4. Confirm the installer is registered with the program you are applying to, and that you pre-register before any work starts.

When dual-fuel beats a full switch, and when it does not

Dual-fuel tends to win when the furnace is young and reliable, when cooling is the main goal, when the household does not qualify for the income-tested program, and when the gas line stays for a range or fireplace anyway. It keeps the upfront cost near $9,000–$16,000our estimate instead of $12,000–$22,000our estimate, and keeps a backup independent of the electrical panel.

A full switch tends to win when the furnace is near the end of its life, when the household qualifies for the Energy Savings Program, or when the plan is to close the gas account and stop paying the daily basic charge inside $12.601/GJ total variable (delivery $8.469 + storage/transport $2.472 + gas $1.66); basic charge $0.4216/day; carbon tax $0. It also sidesteps AHRI matching, because the installer picks the whole matched system. Run both paths through the operating-cost tool, then ask each installer to quote the coil-on-furnace and full-replacement options side by side.