ComfortCostGuide

State cost guide

Washington: HVAC Replacement Cost Calculator

Replacing an HVAC system in Washington typically runs $6,000 to $12,000 installed for a heat pump, or $7,500 to $13,000 for a matched central AC and gas furnace pair. Labor here runs about 22% above the national baseline, with HVAC technicians earning roughly $37.91 an hour, so installation is a bigger share of your bill than in lower-cost states. The ranges below are installed costs, covering equipment and labor for a standard single-family replacement.

Worked example

Take a 1,900-square-foot home in Washington with a 20-year-old gas furnace and a matching central AC that has stopped keeping up. The homeowner switches to a single heat pump handling both heating and cooling, reusing most of the existing ductwork with some sealing and a new pad and electrical circuit. With Washington's above-average labor rates, that job lands in the middle-to-upper part of the $6,000–$12,000 heat pump range — roughly $9,000 to $10,000 — and would push toward the high end if the panel needs an upgrade or ducts need major rework.

Frequently asked questions

How much does a heat pump cost in Washington?

A heat pump replacement in Washington generally costs $6,000 to $12,000 installed. Simple swaps on existing, sound ductwork sit near the low end, while high-efficiency variable-speed units, electrical upgrades, or duct repairs push you toward $12,000.

Is it cheaper to replace just the furnace or the whole system?

A gas furnace alone runs $3,500 to $7,000 installed in Washington, and central AC alone runs $4,000 to $7,500. Doing both at once as a matched pair costs $7,500 to $13,000 — more up front, but you pay one round of labor instead of two, which matters where labor rates run 22% above the national baseline.

Why is HVAC installation more expensive in Washington?

Washington's labor index sits at 1.22, meaning installation labor costs about 22% more than the national baseline, with HVAC technicians earning around $37.91 per hour. On a multi-day changeout, that labor difference can add well over a thousand dollars compared with a lower-cost state.

What does a ductless mini split cost in Washington?

Ductless mini splits in Washington range from $3,500 to $10,000 installed. A single-zone unit for one room or an addition sits near the bottom of that range, while multi-zone systems covering several rooms climb toward $10,000 — often a good fit for older Washington homes with no existing ductwork.

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