Furnace Replacement in Bothell, WA
Gas furnaces and dual fuel systems for Bothell homes on both sides of the county line, sized with a Manual J load calculation, permit included.
Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • WA Electrical Contractor Lic. #HOMECCA782DC • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer • Lennox Premier Dealer
Furnace replacement in Bothell
Home Comfort Alliance replaces gas furnaces and installs dual fuel and heat pump systems in Bothell, on both the King County and Snohomish County sides of the city, from Westhill and downtown to Canyon Park, North Creek and Thrasher's Corner. Bothell is served by our Redmond branch. Every replacement starts with a free in-home estimate and an ACCA Manual J load calculation, so the new furnace is sized for your home.
Considering a heat pump instead of, or alongside, a new furnace? See heat pump installation in Bothell.
We pull the required permits, give you a written, upfront price before any work begins, and back new installations with a 3-year Comfort Shield labor warranty, kept active with yearly maintenance. First-year maintenance is included.
Is it time to replace your Bothell furnace?
Many furnaces in Canyon Park and Thrasher's Corner homes are original or second units from the 1990s and early 2000s. Replacement usually wins over repair when:
- The furnace is around 15 to 20 years old and the quote is for a heat exchanger, inducer or board.
- It is an 80% AFUE unit and your PSE gas bills keep rising.
- Some rooms run hot and others cold, or the furnace starts and stops every few minutes.
- You see rust, soot or a yellow flame, or a carbon monoxide alarm sounds. Smell gas? Get outside and call PSE at 1-888-225-5773.
Still deciding? Our furnace repair technicians give a straight answer on whether a repair is worth it.
Furnace efficiency options for Bothell homes
| Furnace type | How it heats | Good fit when |
|---|---|---|
| 80% AFUE single or two-stage | Vents through the existing metal flue | Budget is tight and the furnace sits where a PVC vent is hard to route. |
| 95% to 97% AFUE two-stage or variable-speed | Condensing; vents through PVC pipe, needs a drain | You want lower gas bills and quieter, steadier heat; the usual Bothell choice. |
| Modulating furnace | Adjusts output in small steps | Two-story homes where upstairs and downstairs never match. |
| Dual fuel (furnace plus heat pump) | Heat pump first, furnace on the coldest days | You also want cooling; PSE pays $1,500 for adding the heat pump. |
What goes into a Bothell furnace installation
- Sizing: a Manual J load calculation using your home's square footage, insulation, windows and air leakage.
- Venting and gas: checking the flue or planning a new PVC vent, and confirming the gas line can carry the new furnace.
- Ducts and air flow: checking the ductwork, return air and filter, because a new furnace on leaky or undersized ducts will not deliver its rated comfort.
- Controls: a thermostat set up for the new system, including heat pump lockout settings on dual fuel systems.
- Permit and inspection: Bothell issues mechanical permits for the whole city, on both the King and Snohomish County sides, through MyBuildingPermit.com. We file the permit and schedule the inspection.
What a Bothell furnace replacement costs
Your price comes down to the furnace's efficiency and capacity, whether it needs a new PVC vent or condensate drain, gas line or duct changes, and whether you add a heat pump. A garage furnace in a 1990s home is usually the simplest; an attic unit in a townhome takes more labor. Use the instant quote tool for a price range in about 30 seconds, then a free visit gives you a fixed, written price. See typical ranges in our 2026 furnace cost guide.
- Free replacement estimates.
- Furnace tune-ups: $230, or $180 for Home Comfort Club members.
- Payment plans from $179/month* through Salal Credit Union or Synchrony.
*Financing through Salal Credit Union or Synchrony, subject to credit approval. Rates, terms and monthly payments depend on the amount financed, the plan and your credit. 0% interest options are available to qualifying customers. See lender for full terms.
Get a free estimateFree in-home estimates on new furnaces, with a written, upfront price.
Rebates for a new furnace or heat pump in Bothell
Bothell homes get natural gas from Puget Sound Energy. Electricity comes from PSE on the King County side and from Snohomish County PUD on the Snohomish County side, so the heat pump rebates depend on your address. As of October 2026, no utility here offers a rebate for a gas furnace on its own:
| Program | Amount | Who qualifies |
|---|---|---|
| PSE hybrid heat pump | $1,500 | PSE gas customers adding a ducted heat pump to a gas furnace, installed by a PSE Trade Ally |
| PSE Efficiency Boost | $2,400 | Income-qualified PSE customers, on top of the hybrid rebate |
| PSE moderate-income fuel switch | $4,000 | Income-qualified PSE gas customers replacing gas heat with a heat pump |
| Snohomish PUD ducted heat pump | $1,800 (conversion) or $2,500 (inverter-driven) | Homes heated mainly by electricity, installed by a PUD Trade Ally |
Home Comfort Alliance is an approved contractor for PSE and Snohomish PUD, and we handle the PSE rebate paperwork for you. The federal 25C tax credit ended for equipment installed after December 31, 2025. See all rebates.
From estimate to first heat: a Bothell replacement
- Book a visit at (425) 645-0404, or get a range from the instant quote.
- A Redmond-branch comfort advisor runs the Manual J calculation and checks venting, gas supply and ducts.
- You get side-by-side written prices, for example a furnace alone and a dual fuel system.
- We apply for the City of Bothell permit on MyBuildingPermit.com.
- Install day: old furnace out, new one in, gas pressure and safety controls tested.
- Inspection, then a walkthrough and warranty registration.
A recent Bothell furnace replacement
In October we replaced the heating system in a Bothell home in the 98011 ZIP code. The homeowner chose a dual fuel setup: a Lennox ML180E 70,000 BTU gas furnace paired with a Lennox EL18KSLV variable-speed heat pump. The existing ductwork was in good shape, so we reused it, pulled the permits and applied the PSE heat pump rebate.
The heat pump now handles most of the heating and adds summer cooling, and the furnace takes over on the coldest days.
What you get with Home Comfort Alliance
- Free in-home estimates and a written, upfront price before any work begins.
- Manual J sizing and the required permits on every installation.
- 3-year Comfort Shield labor warranty on new installations, kept active with yearly maintenance. First-year maintenance is included.
- Home Comfort Club members with a new system installed by Home Comfort Alliance get extended labor coverage for up to 5 years from installation.
- Lennox Premier Dealer and Carrier Factory Authorized Dealer; we service all major brands.
- NATE-certified technicians. Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD).
Bothell homes: what we plan for
Bothell has older homes near downtown and Westhill, 1980s and 1990s subdivisions around Canyon Park and Thrasher's Corner, and newer townhomes near North Creek. Furnaces sit in garages, basements, closets and attics. Townhomes often need a slim, high-efficiency furnace vented through a side wall, and homes on the Snohomish County side that heat with electricity are often better served by a heat pump.
We check venting, the gas line, return air and duct condition at the estimate, so the price you get is the price you pay.
Where we replace furnaces near Bothell
Our Redmond branch serves all of Bothell, in the 98011, 98012 and 98021 ZIP codes, plus nearby Kenmore, Woodinville, Kirkland and Mill Creek. See all Bothell services.
Bothell furnace replacement questions
How much does furnace replacement cost in Bothell?
It depends on the furnace type and efficiency, venting, gas and duct work and where the furnace sits. Our free instant quote tool gives a price range in about 30 seconds, and a free in-home estimate gives you a written, upfront price.
Do I need a permit to replace a furnace in Bothell?
Yes. The City of Bothell issues mechanical permits for both the King and Snohomish County sides through MyBuildingPermit.com. We pull the required permits for every installation.
Which utility serves my Bothell home?
Natural gas comes from Puget Sound Energy everywhere in Bothell. Electricity comes from PSE on the King County side and from Snohomish County PUD on the Snohomish County side.
Are there rebates for a new furnace in Bothell?
As of October 2026, there is no utility rebate for a gas furnace on its own. PSE pays $1,500 for adding a ducted heat pump to a gas furnace, and Snohomish PUD pays toward ducted heat pumps in electrically heated homes on the Snohomish County side.
Should I get a dual fuel system instead of just a furnace?
If you want lower heating bills and summer cooling, a dual fuel system is worth pricing: the heat pump handles most of the heating and the gas furnace covers the coldest days. We quote both at the estimate.
Can you reuse my existing ductwork?
Often, yes. We inspect the ducts at the estimate and reuse them when they are sound and sized for the new system, as we did on a recent Bothell job.
What size furnace does my home need?
The right size comes from a room-by-room load calculation (ACCA Manual J), not from the size of the old furnace. Oversized furnaces short cycle and wear out sooner.
How long does a furnace last?
Most gas furnaces last about 15 to 20 years with yearly maintenance. A furnace tune-up is $230, or $180 for Home Comfort Club members.
Is there a warranty on a new furnace?
New installations come with a 3-year Comfort Shield labor warranty, kept active with yearly maintenance, and first-year maintenance is included.
Can I finance a new furnace?
Yes. Financing through Salal Credit Union or Synchrony, with low monthly payment plans starting at $179/month* and 0% interest options for qualifying customers.
Sources
- Puget Sound Energy, hybrid heat pump rebate (checked October 2026)
- Snohomish County PUD, heating rebates (checked October 2026)
- MyBuildingPermit.com (City of Bothell permits) (checked October 2026)
- U.S. Department of Energy
Why Choose Home Comfort Alliance in Bothell?
Your Comfort is Our Promise
We promise...
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Get a free furnace estimate in Bothell
Tell us about your home and a Redmond-based comfort advisor will call to set up a free in-home estimate, with a written, upfront price and the rebates you qualify for.
Get an estimate
Our phones are answered and bookings are accepted 24/7. Estimates are scheduled during business hours.