Top 10 Ac Installation in Seattle, WA
The best AC installation companies in Seattle, WA for 2026 include Greenwood Heating and Home Services (4.9), Evergreen Home Heating and Energy (4.8), Glendale Heating & Air Conditioning (4.8). All offer free estimates, licensed installation, and manufacturer warranties on new units.
AC Installation in Seattle, WA: What to Know Before You Buy
A new AC system is a major investment. The right installer in Seattle, WA will properly size the unit for your home, handle permits, and back the work with a solid warranty. Undersized or poorly installed systems waste energy and fail early.
- Get a Manual J load calculation — not just a rule-of-thumb sizing
- Ask about SEER2 ratings and expected monthly energy costs
- Confirm the warranty covers both equipment and labor
Greenwood Heating and Home Services
Green City Heating and Air Conditioning
Evergreen Home Heating and Energy
Go Green Heating AC & Electric
Essential Heating and Air
Seattle Heating & Cooling
Glendale Heating & Air Conditioning
Seattle Heating & Cooling
Brennan Heating, Air Conditioning, & Electric
GREENTOP Heating
About These Listings
Provider details on this page come from public business information and each provider's own website. Inclusion here is not an endorsement, and the order shown is not a guarantee of quality. Before hiring, verify licensing, insurance, and pricing directly with the company — request written quotes and confirm credentials with your state or local licensing board.
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Frequently Asked Questions
How much does AC installation cost in Seattle
AC installation in Seattle costs $3,000-$7,000 for a central air system. A full HVAC system (AC + furnace) runs $5,000-$12,000. Mini splits cost $2,000-$5,000. Price depends on home size, SEER rating, and ductwork needs
How long does AC installation take
Standard replacement takes 4-8 hours (1 day). New installation with ductwork takes 2-5 days. Mini split installation takes 1-2 days
What size AC do I need
General rule: 1 ton per 500-600 sq ft. A 2,000 sq ft home needs a 3-3.5 ton unit. A professional load calculation (Manual J) gives the precise answer — oversized or undersized units waste energy and fail faster