HVAC buying guide for Seattle homeowners

Plan your project

Seattle's housing stock runs from 1910s Craftsmas with no ductwork to new townhomes with tight envelopes. For homes in Seattle, compare proposals based on the home's measured needs, not just brand or advertised price. Existing equipment, insulation, ductwork and access can change the right approach — and for homes without ducts, a ductless system is often part of the conversation.

Ask the contractor

• Will you evaluate heating and cooling loads before selecting capacity?
• How will you assess ducts, return air and airflow?
• Which specific models and efficiency ratings are proposed?
• Who handles permits, startup testing and warranties?

Check registration and compare bids

Before signing, verify the company through the Washington Labor & Industries contractor lookup and obtain written, itemized estimates. This guide does not publish an unverified “best” contractor ranking.

Reference materials

• ENERGY STAR: 10 tips for hiring a heating and cooling contractor
• ACCA: Manual S residential equipment selection
• U.S. Department of Energy: heat pump systems
• Washington L&I: verify a contractor

Need site-specific advice? Ask a qualified HVAC professional to evaluate your home.