HVAC Installation & Service in Seattle, WA
HVAC Installation & Service companies serving Seattle — compare ratings, hours, and contact details.
118
Pros actively working
4.5
What people rate them
Seattle, Washington HVAC company map
See where the best hvac installation & service crews are located around Seattle, Washington.
Loading the map...
HVAC Installation & Service in Seattle: what the listings show
Of the 118 HVAC Installation & Service contractors listed in Seattle, 29 advertise 24-hour availability and 74 are open on Sundays.
118
contractors listed
29
open 24 hours (26%)
74
open Sunday (67%)
80
open Saturday (72%)
66
have a website
Why Seattle's coastal weather breaks HVAC systems
In Seattle, summer highs average 75°F. That strains compressors, refrigerant lines, and condensate drains. Common local issue: compressor wear due to high runtime. Recommended: systems rated SEER2 15+ for this climate.
Complete HVAC Installation & Service in Seattle
System installation
Manual J sizing, duct design, and equipment commissioning.
Heat pumps
SEER2 and HSPF2 optimized heat pump installs.
Ductwork upgrades
Airflow balancing and duct sealing.
Smart controls
Thermostat calibration and zoning.
HVAC Installation & Service costs in Seattle (2026 estimates)
| Service | Low | High |
|---|---|---|
| System replacement | $8,976 | $13,464 |
| Heat pump install | $10,608 | $15,912 |
| Ductwork upgrade | $3,672 | $5,508 |
Prices reflect local labor rates in Washington.
Serving Seattle and surrounding neighborhoods
Verified hvac installation & service companies cover ZIP codes across the Seattle metro and surrounding areas.
Seattle HVAC permits & rebates
Permits Required
Most system replacements in Seattle require a permit from the Seattle Building Department.
Available Rebates
Check for rebates with your local utility provider for SEER2 heat pumps, smart thermostats, and insulation upgrades.
Seattle HVAC FAQ
Full system replacements in Seattle average $8,000–$14,000 installed. Heat pump systems run $10,000–$16,000. Get at least 3 itemized bids including equipment, labor, permits, and disposal of the old unit.
Yes. Seattle requires a mechanical permit for full system replacements and new gas line connections. Your licensed contractor must pull the permit before work starts and schedule a city inspection after installation.
Most straight-swap replacements take 4–8 hours. New construction installs or full duct replacements run 1–3 days. Confirm the scope includes equipment delivery, permit scheduling, and post-install commissioning.
Check license status through the Washington state licensing board's online lookup tool. All installers working with refrigerant must also carry EPA Section 608 certification.
Top HVAC pros in Seattle
Compare verified providers with strong local reputations and recent customer feedback.
Call to confirm availability and request a quote.
Call to confirm availability and request a quote.
Call to confirm availability and request a quote.
Need hvac installation & service in Seattle today?
One call connects you with an available local contractor — no forms, no waiting.
HVAC Installation & Service performance guide for Seattle, Washington
Climate averages are state-level reference values, not city-specific measurements.
Climate impact in Seattle, Washington
Seattle, Washington sits in a Marine climate zone with average summer highs near 75°F and winter lows near42°F. Those swings load the evaporator coil, blower motor, refrigerant lines, and condensate drain. Keep a clean MERV filter to protect the compressor.
Seasonal swings stress refrigerant lines and condenser capacity. Verify charge and airflow to protect the evaporator coil.
Most common local breakdowns
Outdoor coil corrosion and fan motor wear from salty air exposure.
Defrost control and sensor drift on heat pumps during long shoulder seasons.
Low airflow from dirty MERV filters or a weak blower motor causes ice. Ask for airflow and refrigerant superheat checks.
Equipment recommendation
Heat pumps perform well here; pair a SEER2 15+ system with corrosion-resistant coils and routine condensate drain maintenance. Seal ductwork and schedule coil cleaning to protect the heat exchanger, capacitor, and compressor.
Heat pumps favor variable-speed compressors and tight refrigerant line sets to stabilize humidity control.
Local code and housing notes
Ask contractors about Washington energy code compliance and permits. Older homes often benefit from ductless mini-splits to reduce line-set length and improve zone control.
Mechanical permit for system replacement and condenser swaps.
Post-install inspection covering refrigerant line pressure and condensate drain routing.
Load calculation proof to avoid short-cycling compressors.
Airflow verification (blower motor speed + static pressure).
Always confirm a contractor's license and insurance before hiring.
Learn more: Washington HVAC coverage · SEER2 rating guide · MERV filter selection · Editorial Policy · How We Rank