Heat pump or gas furnace: which is right for your Seattle home?
This is the decision framework — not the side-by-side table. In the Seattle area the choice usually comes down to three inputs: what you're replacing (conversion rebates only apply when you switch fuels or leave resistance heat), how long you'll stay in the home, and whether you want air conditioning — which a heat pump includes and a furnace never will. Use this page to walk those inputs; use the comparison table when you already know you want column-by-column specs.
The quick answer
- Heat pumps heat AND cool — one system covers winter and our now-regular heat waves
- Seattle City Light and PSE pay real money to switch — but only at replacement time
- Electricity rates are climbing (SCL +5.4% in 2025 and 2026), so honest math models rates, not slogans
- Dual-fuel — heat pump plus your gas furnace as backup — is the legitimate middle path
When a heat pump is the right call
You want cooling as well as heating, your electrical panel has capacity (or you're budgeting to update it), and you plan to stay long enough for efficiency to pay back the higher install cost. Modern cold-climate units hold full capacity well below Seattle's design temperatures, so the old 'heat pumps don't work in the cold' objection doesn't apply to current equipment.
The rebate landscape leans the same way: PSE pays $3,000–$4,000 to switch from gas, $1,500–$2,400 to switch from electric resistance, and Seattle City Light adds instant discounts of $300–$600 that grow with the unit's HSPF2 rating. Oil-heated homes have the strongest case of all — Seattle Clean Heat runs $2,000 up to $6,000.
When keeping (or replacing with) a gas furnace makes sense
Your furnace is mid-life and repairable, you don't want cooling, your panel can't support a heat pump without a costly upgrade, or the install budget is the binding constraint — furnace replacement typically costs roughly half a ducted heat pump install in our market.
A modern 90%+ AFUE condensing furnace is a real upgrade over an older 80% unit. What it can't do is cool your home, and it locks you into PSE gas rates that rose about 9.4% in 2025.
The middle path: dual-fuel
A dual-fuel setup runs a heat pump as the primary system and keeps a gas furnace as backup for the coldest snaps. You get cooling, most of the efficiency win, and PSE's hybrid rebate ($1,500, or $2,400 income-qualified) — without betting the whole house on one fuel. It's a common recommendation for homes with a newer furnace that's too good to scrap.
What does it cost in the Seattle area?
Typical Seattle-area installed ranges for the three paths:
Gas furnace replacement
$4,000 – $9,000 typical ~$5,500
New high-efficiency furnace, installed — equipment, labor, permit
Sources: Home Comfort Alliance Seattle furnace guide (2026) · HVAC Project Cost — Seattle, WA (2026)
Ducted heat pump installation
$8,000 – $16,000 typical ~$10,200
All-electric heating + cooling using your existing ductwork
Sources: HVAC Project Cost — Seattle, WA (citing Angi 2026) (2026) · WattFax — 113 WA homeowner quotes (2026)
Ductless mini-split (multi-zone)
$6,000 – $15,000
One or more outdoor units serving 2–4+ rooms
Sources: Seattle Mini Split Pros cost guide (2026) · Angi — ductless mini-split cost, Seattle WA (2026)
- Utility rebates (above) apply to the heat pump paths only — and only at conversion time
- Electrical panel capacity is the hidden cost driver on heat pump retrofits in older homes
- Washington's ~10% sales tax applies to equipment either way
- Duct condition matters: leaky ducts waste either system's output
These are typical Seattle-area market ranges compiled from published cost guides (Angi, HomeGuide, and Seattle-area 2025–2026 cost studies) — market context, not a quote from Glendale Heating & Air Conditioning. Your home's size, equipment, ductwork, electrical, and permits change the number. National figures are marked; Seattle-area labor typically runs above national averages.
The honest trade-offs
Cold-climate heat pump
- Heats and cools with one system
- Rebate-eligible: SCL instant discounts, PSE conversion rebates
- No combustion in the home; no gas bill for heating
- Higher upfront cost than a furnace swap
- May need panel or wiring work in pre-1980 homes
- Savings depend on electric rates, which are rising
High-efficiency gas furnace
- Lowest install cost of the three paths
- Familiar, fast heat; no electrical upgrade needed
- 90%+ AFUE is a real gain over an older 80% unit
- No cooling — a separate AC is its own project
- No utility rebates for staying on gas
- Exposed to gas rate increases (PSE +9.4% in 2025)
Dual-fuel (heat pump + gas backup)
- Cooling plus efficient heat, with gas security blanket
- PSE hybrid rebate applies
- Keeps a newer furnace working instead of scrapping it
- Two systems to maintain
- Smaller rebate than a full fuel switch
- Controls must be set up correctly to actually save money
The mistakes we see in this decision
Buying on a slogan in either direction. 'Heat pumps don't work here' is out of date; 'you'll save thousands every year, guaranteed' is salesmanship — real savings depend on your current fuel, your home's envelope, and rate trajectories. Ask any bidder to show their assumptions.
The second mistake is sizing by rule of thumb. An oversized heat pump short-cycles and never reaches its rated efficiency; the right answer starts with a load calculation on your actual house, not a per-square-foot guess. The third: missing the rebate window — conversion money only exists at replacement time, and programs change terms or run out of funds.
Local blind spots: SCL customers who compare only to gas bills without modeling electric-rate trajectory; PSE customers who ignore panel scope on pre-war homes; owners who treat the comparison table as the decision instead of walking this framework first. Stay horizon and housing stock — ducts, lot lines, ADUs — often pick the path before fuel math does.
Dual-fuel done wrong — furnace running more than cold snaps require — shows up in the bills before it shows up in the brochure comparison rows.
Questions Seattle homeowners ask
Do heat pumps work in Seattle winters?
Yes. Seattle's winter design temperatures are mild, and modern cold-climate heat pumps hold their rated capacity well below them. The equipment objection dates from older single-stage units — current variable-speed systems are built for exactly this climate.
Which rebates apply if I switch from gas to a heat pump?
PSE customers: $3,000 standard, up to $4,000 for manufactured homes or income-qualified households, with the gas heat removed or capped. Seattle City Light customers get instant equipment discounts of $300–$600 by efficiency tier. Programs verify eligibility, and installer-network rules apply from April 2026 — we handle the paperwork on qualifying installs.
Is dual-fuel worth it, or is it a compromise that does neither well?
Done right, it's a genuine strategy, not a fence-sit: the heat pump carries most of the season efficiently, the furnace covers cold snaps, and PSE pays a hybrid rebate. The catch is controls — the switchover point must be configured for your rates, or the furnace runs more than it should.
Can I get a federal tax credit for a heat pump in 2026?
No. The federal 25C credit (up to $2,000 for heat pumps) ended for equipment placed in service after December 31, 2025. Ads still promoting it are out of date. Washington's utility rebates — SCL and PSE — remain active and real.
What does each path cost in the Seattle area?
The sourced market ranges are in the table on this page — roughly, a furnace swap costs about half of a ducted heat pump retrofit before rebates. Your home's ducts, panel, and size move the number, which is why we put exact pricing in a written free estimate rather than a webpage. Pre-war homes with panel work or ductless configurations often land outside the midpoint of the published ranges — the framework here picks the path; the estimate prices your house.
Continue exploring
How we know this
Rebate facts verified July 2026 from seattle.gov, pse.com, and commerce.wa.gov. Cost ranges from published Seattle-area studies (Angi, HomeGuide, 2025–2026) — market context, not Glendale quotes. Rate-increase figures from Seattle City Light and PSE published rate schedules.
Reviewed by the Glendale Heating & Air Conditioning team · Last updated 2026-07-15
Ready for comfort you can count on?
Whether it's a furnace that quit on a cold morning or a whole new system, the Glendale team is ready. Honest pricing, expert work, and 87+ years behind every visit.
Hours & Emergency
- Mon–Sat: 8:00 AM – 7:00 PM
- Sun: Emergency On-Call Only
- Emergency line: (206) 243-7700