A heat pump installation is a longer decision than a repair — you’re picking a system that runs your home for the next 15 to 20 years. The size has to match your house, the electrical has to support it, and the ductwork has to move the air the new system produces. Get one of those wrong and a brand-new high-efficiency system underperforms a properly-sized older one.
What’s Included in a Heat Pump Installation
1. In-home assessment
A tech visits the property, looks at the current heating and cooling setup, checks the electrical panel, inspects existing ductwork (if any), and measures the rooms. This is a full walkthrough, not a sales drop-off.
5. Old equipment removal
If we’re replacing a furnace, AC, or old heat pump, we remove and recycle the old equipment. Refrigerant in old AC or heat pump units is recovered to EPA standards — not vented.
2. Sizing
We size the heat pump to the house, not to the label on the old system. The tech looks at square footage, insulation, windows, ceiling height, and how the current system keeps up. An oversized heat pump short-cycles and dehumidifies poorly. An undersized one runs constantly and gives up on the coldest mornings.
6. Installation
Indoor air handler or furnace coil set, outdoor condenser mounted on a pad or wall bracket, line set run, condensate drain plumbed, electrical disconnect installed, low-voltage controls wired in. For ducted systems, we verify static pressure and modify ductwork where needed.
3. Equipment recommendation
Based on the assessment, your home layout, and your budget, we recommend a specific system. You see the model numbers and the SEER2 and HSPF2 ratings before you decide. We install Mitsubishi Electric, Bosch, Trane, Carrier, Lennox, Goodman, and RunTru.
7. Commissioning
Once the heat pump installation is complete, we charge it to the manufacturer’s spec, verify airflow at the registers, set up the thermostat, and run it through a full heating and cooling cycle.
4. Permits
Every heat pump installation in King and Snohomish County requires a mechanical permit. We pull it. You don’t talk to the city.
8. Inspection coordination
The city inspector comes out within a week or two of the heat pump installation. We schedule it and meet them on site.
Why Fuse Service
Why Choose Fuse Service
Licensed EPA-Certified Technicians
Every heat pump installation is handled by a licensed, EPA 608-certified technician. We size the system to your house from the first visit, so it heats and cools the way it should.
Same-Day Availability
We offer same-day in-home estimates when the schedule allows and fast heat pump installation scheduling, so you are not waiting out a cold snap or a heat wave with a failing system.
3-Year Labor + Up to 12-Year Parts
New heat pump installations include a 3-year labor warranty from Fuse Service, plus a manufacturer parts warranty of up to 12 years. Fuse Care 5-year and 10-year labor coverage is available as an optional paid upgrade.
Upfront Pricing — No Surprises
You’ll get a clear written estimate before any work begins. No hidden fees, no post-install additions. The price we quote is the price you pay.
What Affects Heat Pump Installation Cost
Electrical capacity
A heat pump usually pulls between 20 and 50 amps. If your panel is already near capacity, you may need a sub-panel or a service upgrade. We flag this during the assessment, not on install day.
System type
A ducted central heat pump costs differently than a ductless multi-zone install. The right choice depends on whether you already have ductwork and whether you want zone-by-zone control.
Home size and load
A 1,200 sq ft cottage in Ballard and a 3,800 sq ft house in Sammamish need different equipment. Sizing to the house decides.
Efficiency tier
Higher SEER2 and HSPF2 ratings cost more up front and use less electricity every season. Cold-climate models hold their heating output better on the coldest nights.
Ductwork condition
Existing ducts that are well-sealed and properly sized keep a heat pump installation simple. Older homes sometimes need a partial duct redesign or sealing — that adds cost but improves performance.
Backup heat
Some homes benefit from an electric resistance backup strip or keeping the existing gas furnace as a dual-fuel backup. The choice affects equipment selection for the heat pump installation.
Outdoor unit placement
Where the outdoor unit goes, how long the line set run is, and whether it sits on a pad or a wall bracket all affect labor time on a heat pump installation. Longer runs and tricky mounting take more work.
Permit fees and inspection
Bellevue, Kirkland, Redmond, Seattle, and unincorporated King County all have slightly different permit fees. These are pass-through costs included in your quote.
Brands We Service
We install and service the major heat pump brands: Mitsubishi Electric, Bosch, Trane, Carrier, Lennox, Goodman, RunTru. We stock the most common parts on the truck so most repairs don’t need a second visit.
Areas We Serve
Fuse Service installs heat pumps across King County and Snohomish County. Whether you’re in Seattle proper or a surrounding suburb, our technicians are familiar with local building codes, permit requirements, and the heating and cooling needs of Pacific Northwest homes.
Heat Pump Installation
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