WA Lic. INFINHA841B8 400+ Google reviews
Quick answer
- Heat pumps heat AND cool; furnaces only heat.
- In our mild winters, a heat pump does the vast majority of the season's work efficiently.
- Dual-fuel (heat pump + furnace) covers both: efficiency most days, gas muscle in a cold snap.
- The right answer depends on your ductwork, electrical panel, fuel prices, and how long you'll stay in the home.
Comfort character
Furnaces deliver short bursts of very hot air; heat pumps deliver longer, gentler cycles at lower supply temperatures. In practice, homes with variable-speed heat pumps have steadier temperatures and fewer hot-cold swings — a noticeable upgrade during our months-long 40-degree drizzle season.
Operating cost
Efficiency favors the heat pump: it moves two to three units of heat per unit of electricity in mild weather, while even a high-efficiency furnace converts fuel to heat at slightly under 1:1. Actual bills depend on your utility's electric rate versus gas rate, so we run the numbers per household instead of promising a percentage.
The dual-fuel middle path
If you already have a working gas furnace and ducts, adding a heat pump upstream creates a dual-fuel system: the heat pump handles everyday heating and all cooling, and the furnace takes over automatically below a set balance-point temperature. It's a popular retrofit here because it reuses what you own.
When a straight furnace still makes sense
If your electrical service can't support a heat pump without a costly panel upgrade, or you need a like-for-like replacement fast in the middle of winter, a modern high-efficiency furnace is still a sound choice. We'll tell you honestly if that's your situation.
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Family owned · WA Lic. INFINHA841B8 · 400+ Google reviews
Common questions
Can I keep my furnace and still add a heat pump?
Usually yes — that's a dual-fuel system. The heat pump replaces (or joins) the AC on your existing ducts, and the furnace becomes backup heat. Compatibility depends on your air handler and controls, which we confirm during an assessment.
Do heat pumps struggle in Washington winters?
Not in a typical one. Our winters are mild by heat pump standards. Cold-climate models are rated to keep significant output well below 0°F, far colder than the South Sound usually sees.
Which lasts longer?
Furnaces often run 15–20 years, heat pumps typically 12–15+. Remember a heat pump also replaces your AC — you're comparing it to two machines, not one.
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Infinity Heating & Air — licensed WA HVAC contractor (Lic. INFINHA841B8), family-owned in Graham. Last updated July 2026.