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Bellingham Heating & Cooling — Bellingham's Energy Savings Team
Heat pump air handler installed in place of an electric furnace in a utility closet with the existing ductwork reused

Installed price · verified 2026-09-04

Furnace to heat pump conversion cost

$4,000–$8,000 Installed ducted air-source heat pump replacing a furnace and reusing serviceable ductwork, Bellingham. A second local source publishes $4,900–$11,700 for ducted heat pump work, which is where duct modification and electrical upgrades push the same project., before rebates. Here is what decides where in that range your house lands.

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Furnace to Heat Pump Conversion Cost in Bellingham in Bellingham

Installed ducted air-source heat pump replacing a furnace and reusing serviceable ductwork, Bellingham. A second local source publishes $4,900–$11,700 for ducted heat pump work, which is where duct modification and electrical upgrades push the same project.

Simple job
$4,000
Complex job
$8,000

Installed price before rebates — equipment, labour, materials, permit and startup. The federal §25C tax credit contributes $0 in 2026: it terminated for anything placed in service after December 31, 2025.

Range benchmarked 2026-09-04 against published local pricing. Your quote is fixed before work starts — no hourly surprises.

  • WA L&I #BELLIHC808NM Active registration — verify it with the state
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  • $1,000,000 insured General liability coverage
  • Local since 2020 Owner-operated in Whatcom County
  • We pull the permit City of Bellingham or Whatcom County, and we meet the inspector

What moves your number

Most impactful first. These are the questions we ask on the phone, and they are the reason a range exists at all.

Whether the old furnace was electric or gas — this decides your rebates, not your price
$1,500–$2,400 available on an electric furnace, $0 on a gas furnace in Bellingham
The mechanical work is nearly the same either way, but the money is not. PSE’s conversion rebate pays $1,500, or $2,400 with Efficiency Boost, when the existing primary heat is electric resistance, which includes an electric forced-air furnace. PSE’s gas-side rebates require the customer to be a PSE natural gas customer, and Bellingham’s gas utility is Cascade Natural Gas, so a Bellingham gas furnace conversion currently receives no PSE conversion rebate at all.
Duct condition and static pressure
duct repair can add meaningfully to a conversion that otherwise reuses everything
A furnace runs hot air through the ducts in short bursts; a heat pump runs cooler air continuously and needs more of it. Ducts that were adequate for an 80% furnace are sometimes undersized for the airflow a heat pump wants, especially the return side. In Bellingham that gets worse when the trunk runs through a damp crawlspace where the insulation has fallen off decades ago.
Electrical service for a compressor the house never had
$250–$900 for a dedicated circuit, $1,300–$2,500 where the panel must be replaced
A gas furnace draws almost nothing electrically. Adding a heat pump adds a compressor circuit and, if the plan includes electric backup heat, potentially a large one. HomeGuide puts a new dedicated circuit at $250 to $900 and a 200-amp panel upgrade at $1,300 to $2,500, and older Bellingham houses with 100-amp service frequently need the second. All of it is performed by a licensed electrical contractor.
What happens to the gas equipment and the gas line
cut-and-cap or dual-fuel retention, each with its own scope
You can remove the gas furnace entirely and go all-electric, or keep it as the backup in a dual-fuel setup. Removal means the gas line gets properly cut and capped by the appropriate licensed contractor and the flue gets decommissioned and sealed. Keeping it means the controls must switch fuels cleanly and you keep two systems to maintain. Note that PSE does not permit dual-fuel systems in its all-electric heat pump rebates.
Backup heat strategy at 19°F
strip-heat kits and their circuits add cost; correct sizing reduces how much you need
Bellingham’s design temperature is 19°F, colder than Seattle’s 24°F, and Glacier is 13°F for anyone up the Mount Baker Highway. A properly sized cold-climate heat pump carries most of that, but the backup strategy still has to be decided deliberately rather than by default. If backup electric heat is added, PSE requires it to be locked out by an outdoor sensor, recommended at 35°F or below, for its rebates.

What appears on a real quote

Line by line, the way we scope it. If a quote you are holding is a single lump sum, this is the list to ask them to break out.

Furnace to Heat Pump Conversion Cost in Bellingham quote line items and typical ranges in Bellingham, WA
Line item Typical range What it is
Outdoor condenser and indoor coil or air handler the largest line on the conversion —
Plenum transition and coil cabinet to fit the existing duct trunk included; almost always custom on a conversion —
Refrigerant line set from the outdoor unit to the indoor coil new on a conversion; the house has never had one —
Compressor circuit and disconnect by a licensed electrical contractor $250–$900 HomeGuide.
Panel upgrade where the existing service cannot carry the new load $1,300–$2,500 for 200 amps HomeGuide.
Duct repair, sealing or resizing on the return side quoted after static-pressure measurement —
Gas line cut and cap and flue decommissioning, where the furnace is removed by the appropriate licensed contractor —
Condensate drain for the indoor coil included; a pump is added where needed —
Mechanical permit and inspection per the City of Bellingham or Whatcom County fee schedule —
Removal and disposal of the old furnace included —
Commissioning: airflow, charge, lockouts and control changeover included —

Line items are quoted against your house, not averaged. Your written quote is fixed before work starts.

Three worked examples

Same work, three different houses. The arithmetic runs from the installed price, through the programs that apply, to what you write a cheque for.

Electric forced-air furnace in a 1970s Whatcom County home, converted to a ducted cold-climate heat pump reusing the existing ducts

Installed price
$7,000
Rebates applied
  • PSE electric resistance to air-source heat pump conversion: $1,500
  • Federal §25C: $0
You pay
$5,500

An electric furnace is electric resistance heat, which is precisely what the PSE conversion rebate is written for.

Gas furnace in a Bellingham house on Cascade Natural Gas service, converted to a ducted heat pump with the furnace removed

Installed price
$7,500
Rebates applied
  • PSE electric resistance conversion rebate: $0 — the existing heat is gas
  • PSE hybrid heat pump rebate: $0 — requires PSE natural gas or dual-fuel service
  • PSE moderate-income fuel-switching rebate: $0 — requires the primary heat to be fuelled by PSE natural gas
  • Federal §25C: $0
You pay
$7,500

Every PSE gas-to-heat-pump incentive requires PSE gas service, and Bellingham is Cascade territory, so those rebates do not reach this address. It is the fact that changes budgets here.

Income-qualified household, pre-1990 home with an electric furnace, converted to a fully ductless system through the Community Energy Challenge

Installed price
$9,000
Rebates applied
  • PSE conversion rebate at Efficiency Boost: $2,400
  • Community Energy Challenge ductless incentive: up to $2,000
  • Federal §25C: $0
You pay
$4,600 with both at full value

Going ductless opens the CEC ductless incentive and sidesteps the duct problem entirely. In a house with leaky crawlspace ducts that is usually the better engineering answer as well as the cheaper one.

No example includes a federal tax credit, because there is none to include for a 2026 install. The largest single line in most of these is Puget Sound Energy's $1,500 electric-resistance conversion rebate, which is contractor-gated — PSE requires the installer to be inside its network, so ask us to confirm status for your project before you count on it.

Rebates that come off this price

  • $1,500

    Available now

    $2,400 with PSE Efficiency Boost for income-qualified households.

    Paperwork:
    We file it
    Deadline:
    No published end date — tariffed and subject to change
    Verified:
    2026-09-04 · source

  • Raises other PSE rebates

    Income-qualified

    Heat pump $1,500 → $2,400 · heat pump water heater $1,000 → $1,100 · smart thermostat $75 → $175.

    Paperwork:
    We file it
    Deadline:
    Ongoing
    Verified:
    2026-09-04 · source

  • Community Energy Challenge — moderate income

    Sustainable Connections + Opportunity Council

    Up to $2,000

    Income-qualified

    For a ductless heat pump upgrade. Weatherization incentives average roughly 45% of project cost. Stated by CEC to be in addition to utility rebates.

    Paperwork:
    The program files it
    Deadline:
    Ongoing
    Verified:
    2026-09-04 · source

  • Hybrid Heat Pump Rebate

    Puget Sound Energy

    $1,500

    Check first

    $2,400 with Efficiency Boost — but not reachable from a Bellingham address.

    Bellingham note: Unavailable in Bellingham. This rebate requires PSE natural gas service, and Bellingham’s gas utility is Cascade Natural Gas. PSE supplies electricity to all of Whatcom County but no natural gas, so a gas-heated Bellingham home currently has no PSE gas-to-heat-pump conversion rebate at all.

    Paperwork:
    We file it
    Deadline:
    No published end date
    Verified:
    2026-09-04 · source

  • Cascade Natural Gas Residential Rebates

    Cascade Natural Gas Corporation

    Amounts not published in a verifiable form

    Check first

    Cascade’s rebate pages block automated retrieval and the current offerings PDF renders without its amount table. Figures circulating online (tankless $700, insulation $2.00/sq ft, duct sealing $500) come from a 2024 document and are treated as stale.

    Bellingham note: We list this program because Cascade is Bellingham’s gas utility, but we will not print dollar amounts we could not verify. Confirm current figures with Cascade directly.

    Paperwork:
    You file it
    Deadline:
    Apply within 90 days of installation
    Verified:
    2026-09-04 · source

  • Varies by administrator

    Income-qualified

    Commerce awarded $39.3M across 40 local administrators with no statewide schedule. Whatcom-relevant awards: Sustainable Connections $731,250, Opportunity Council $500,000, Lummi Nation $950,500. Per-household amounts are not published.

    Paperwork:
    The program files it
    Deadline:
    While administrator funds last
    Verified:
    2026-09-04 · source

  • $0 — terminated

    Ended

    Historically 30% of cost, up to $2,000/year for heat pumps and heat pump water heaters. Gone. The One Big Beautiful Bill (P.L. 119-21, enacted July 4, 2025) accelerated its termination.

    Paperwork:
    You file it
    Deadline:
    Terminated — property placed in service after December 31, 2025 does not qualify
    Verified:
    2026-09-04 · source

Every Bellingham rebate, with the source and the date we checked it →

Run your own numbers

A range, not a quote — and the arithmetic is shown so you can check it. Every band below is a published installed price, linked at the bottom.

Sources, all checked 2026-09-04: ductless by zone, ducted in Bellingham, local aggregator range, panel upgrade, dedicated circuit, heat pump water heater. Electrical work is performed and permitted by a licensed electrical contractor — we hold a general contractor registration, not an electrical one.

The work itself

Furnace to Heat Pump Conversion

Use the ductwork you already have to get efficient heating plus air conditioning, and keep the furnace only if it is genuinely earning its place.

See how we do it — process, permits, equipment and timeline →

Talk it through — (360) 592-3824

Furnace to Heat Pump Conversion Cost in Bellingham — questions we get asked

What does it cost to convert from a furnace to a heat pump?
$4,000 to $8,000 installed for a ducted heat pump reusing serviceable ductwork, per local published pricing, with a second local source reporting up to $11,700 where duct or electrical work is included. The conversion itself is not the expensive part; the duct and electrical findings are.
I have a gas furnace in Bellingham. Which rebates apply?
None of PSE’s gas-to-heat-pump rebates. The PSE hybrid heat pump rebate and the $4,000 moderate-income fuel-switching rebate both require the household to be a PSE natural gas customer. Bellingham’s gas utility is Cascade Natural Gas, so neither is available here, and any contractor quoting them to a Bellingham address is quoting something you cannot claim.
I have an electric furnace. Is that different?
Completely different, and much better. An electric forced-air furnace is electric resistance heat, so the PSE conversion rebate applies at $1,500, or $2,400 with Efficiency Boost. That is the strongest rebate position available in Bellingham right now.
Should I keep the gas furnace as backup?
Only if you want two systems and have a clear reason. Dual-fuel keeps a gas safety net for the coldest mornings, but it also keeps a gas bill, a flue, and a second set of maintenance, and PSE does not permit dual-fuel configurations in its all-electric heat pump rebates. At Bellingham’s 19°F design temperature, a properly specified cold-climate heat pump does not need a furnace behind it.
Will my existing ducts work with a heat pump?
Often yes, sometimes only after modification. Heat pumps move more air at lower temperature than furnaces do, so return-side capacity is the usual limit. We measure static pressure and inspect the crawlspace runs before promising that the ducts carry over, because guessing here produces a system that is noisy, uneven and inefficient.
Is there a federal tax credit for converting in 2026?
No. §25C and §25D are terminated for property placed in service after December 31, 2025 under P.L. 119-21, confirmed in IRS FS-2025-05. Budget the conversion with a federal contribution of exactly $0.
What about the Washington sales tax exemption I read about?
There is no heat pump sales tax exemption in Washington that we can find, and several contractor blogs repeat one anyway. The Department of Revenue’s clean-energy exemption guidance covers renewable electricity-generating equipment under RCW 82.08.962, not heat pumps. We do not build a quote around a discount that does not exist.

Get the number for your house

A range tells you whether to keep reading. Tell us about the house and we will tell you which end of it you are at, what the rebates take off, and what the written quote will say.

Or call or text (360) 592-3824. Estimates carry the standard $89.99 trip charge, refunded as company credit when you accept the bid. We do not sell or share your details.

Range benchmarked 2026-09-04 against published local pricing · All published cost ranges

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Tell us what you have now and what you want it to do. We will tell you what fits, what it costs, and which rebates you actually qualify for — before anyone comes out.

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