Heat pump vs furnace + AC: which makes sense in Vancouver’s climate?

Vancouver's climate, in three numbers.

Vancouver WA winters are mild for a heat pump, as three climate numbers show:

• Average winter low: 34°F. That is January's normal low at Pearson Field, and January still averages about 11 nights at or below freezing (NOAA 1991–2020 normals).
• Design temperature: 22°F. This is the winter design temperature in the City of Vancouver's building design criteria, and the one we size heating equipment for.
• Hours below 17°F per year: Typically under 50. Some years zero.

Heat pump vs gas furnace efficiency, by temperature.

Mitsubishi's cold-climate H2i sumo FX-series runs at more than twice the efficiency of a 95% AFUE gas furnace at 17°F, and Vancouver typically sees under 50 hours a year colder than that. A heat pump moves heat instead of burning fuel, and the colder it gets, the harder it works. Mitsubishi's ratings for that model (MSZ-FX12NL with MUZ-FX12NLHZ):

• 47°F outdoor: COP 4.2, about 420% efficient
• 17°F outdoor: COP 2.48 at maximum output, about 250% efficient
• 5°F outdoor: COP 2.2 at maximum output, about 220% efficient
• -10°F outdoor: COP 2.0 at maximum output, twice as efficient as resistance heat

Heat pump vs gas furnace operating cost.

A heat pump costs about $485 a year to heat a typical 2,200 sq ft Vancouver home that needs about 36,000 BTU/hr of heating at design temperature. A 95% AFUE gas furnace costs about $950, roughly $465 a year more.

Gas furnace (95% AFUE)

• Annual heating load: ~60 MMBtu
• Gas usage at 95% AFUE: ~10.5 therms per MMBtu × 60 MMBtu = ~630 therms/year
• At NW Natural's usage rate ($1.506/therm): ~$950/year

Cold-climate heat pump (seasonal COP ~3.2)

• Annual heating load: same ~60 MMBtu = 17,580 kWh of heat
• Electric usage at COP 3.2: ~5,500 kWh/year for heating
• At Clark PUD's usage rate (8.79¢/kWh): ~$485/year

Over a 15-year equipment life, the $465 a year adds up to about $7,000 at today's rates. The math uses usage rates only, because fixed monthly charges don't change with how you heat. Cooling is close to a wash: in our short summers a heat pump and a matching AC use about the same electricity, so no cooling savings are counted. Run the numbers for your own home.

Heat pump vs gas furnace in Seattle or Portland: does the answer change?

The heat pump vs gas furnace answer changes in Portland, and around Seattle it depends on your electric utility, because power in both areas costs more than Clark PUD's. On this article's math and each utility's current residential rates, a heat pump still beats a 95% gas furnace on Seattle City Light power. With Portland General Electric or Puget Sound Energy power, the gas furnace costs less to run unless the heat pump averages a seasonal COP of about 3.7 to 3.8.

Same house, same 60 MMBtu heating load. Only the rates change.

Rates: Seattle City Light standard residential inside Seattle, 2026 rates in effect since January 1, 2026. PSE Schedule 7 over-600-kWh tier (where winter heating use lands) plus per-kWh riders, and Schedule 23 gas with per-therm riders, both effective October 1, 2026. PGE Schedule 7 effective rate for the first 2,000 kWh a month, effective July 8, 2026. NW Natural Oregon Schedule 2, effective October 31, 2025 (a change is filed for October 31, 2026). Fixed charges, monthly credits, public purpose charges and taxes are left out.

Clark PUD's 8.79¢ is less than half of PGE's rate across the river, which is why a heat pump that saves a Vancouver home about $465 a year costs a Portland home more to run than gas. On the ratings above, a heat pump tops COP 3.8 only in mild weather near 47°F, so on PGE or PSE power the running-cost math favors a dual-fuel system that hands the colder hours to a furnace. Cooling stays a wash everywhere.

Heat pump vs furnace and AC installation cost.

A 17 SEER2 heat pump costs more to install than a standard gas furnace and AC, and less than a 96% AFUE furnace with a 17 SEER2 AC. Installed ranges from our estimator, across all home sizes and tiers:

• Gas furnace + AC: $12,600–$26,800
• Heat pump: $8,800–$27,200 before rebates
• Manufacturer rebates: only while a promotion is running for the model you pick (seasonal, no fixed amount). Clark PUD adds nothing here: the ducted rebate needs a Contractor Network installer, and a furnace-to-heat-pump swap is not the electric conversion the program pays for

The federal 25C tax credit expired at the end of 2025, so it is no longer part of this math; see what still works in 2026.

When a furnace + AC still makes sense.

A gas furnace and AC still make sense in three cases, and in these we recommend against switching:

• Your electrical service can't support a heat pump. Some older Vancouver homes have 100-amp service that can't comfortably add a heat pump without an electrical upgrade. That is $3,000–$5,000 extra: often still worth it, but it shifts the math.
• You prefer the feel of gas heat. Heat pumps tend to run longer cycles at lower supply temperatures, which feels different from forced-air gas heat. If this matters to you, a furnace is fine.
• You're staying 3 years or less. If you're selling soon, the install cost doesn't have time to amortize through operating savings.

The hybrid option: dual fuel.

A "dual fuel" system pairs a heat pump with a gas furnace as the backup heat source. The heat pump runs most of the year (high efficiency), and when outdoor temperatures drop below a crossover point (typically 30–35°F), the furnace kicks in.

In Vancouver, dual fuel is a premium option, but a legitimate one for homes with existing gas service, older ductwork concerns, or homeowners who want extreme-weather redundancy. Installed, a dual-fuel system runs $11,300–$33,500 in Clark County at 2026 prices, depending on equipment tier and home size (see our dual-fuel guide).

Want numbers for your own home? Request a quote: we'll size the system, model the operating costs and run the rebate math in writing before you decide. Or read the cost guides first: AC installation and furnace replacement.

Questions homeowners ask.