Evergreen State Cooling

AC Installation in Spokane

Serving Spokane and every community across Spokane County.

Tell us about the job

Takes about a minute. No obligation.

Step 1 of 3: Equipment
A single-story gray horizontal-siding house with multiple gables, a small second-story dormer window, a covered front entry, an outdoor air conditioning unit, young shrubs along the foundation, and a patchy green and brown lawn under a clear blue sky.

A contractor sizing central AC here has to solve for a system that may never be asked to run. Homes in Spokane County, WA have essentially no cooling season — no month of the year is warm enough to call for it. Compressors that sit off indefinitely develop seal and refrigerant issues that a system running regular cycles would surface quickly. The installer's work on refrigerant charge, electrical connections, and coil seating has to hold through long inactivity, because the first genuinely hot day is when every weakness shows and when every other homeowner calls at once.

NOAA National Centers for Environmental Information, nClimDiv county and statewide normals, 1991-2020.
A gray electrical breaker panel with its door open, mounted on a stained concrete basement wall with exposed joists, ductwork and conduit above, and a plastic bucket and mop on the floor to the right.

Existing ductwork is what shapes the cost and complexity of a central AC installation here more than any other single factor. Half the homes in Spokane County, Washington were built in 1978 or earlier (2020-2024 ACS 5-year). Ductwork laid down for heating-only systems was sized and routed for a different job, and a contractor evaluating an installation has to determine whether those runs deliver adequate airflow to every zone or whether sections need to be altered, added, or replaced. The electrical service gets the same look: a new condensing unit draws a dedicated circuit, and the panel has to support it. What the house already contains is what drives the quote.

U.S. Census Bureau, 2020-2024 American Community Survey 5-Year Estimates

What Gets Installed With a New Central AC

Isometric cutaway illustration of a house showing interior ductwork, an air handler, and an outdoor condenser unit connected by lines, with simple furniture in the rooms.

The outdoor condenser unit sits outside the house, usually on a concrete pad beside the foundation, and holds the compressor and condenser coil. Inside, the air handler or furnace-mounted evaporator coil lives in a utility space, basement, or closet and is the indoor half of the refrigerant circuit. These two units are what a homeowner is buying when they buy central air.

A copper refrigerant line set runs between the indoor and outdoor units, connecting them through the wall or floor. The thermostat goes on an interior wall where it reads the home's air and tells the system when to run. A condensate drain line also runs from the indoor coil to carry away the moisture it pulls from the air.

The drawing shows a typical layout, and a licensed contractor determines exactly how each piece is positioned and routed for your specific house.

Get matched in Spokane County

Spokane County, by the numbers

663

663 severe weather events were recorded in Spokane County, Washington between 2015 and 2024.

NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.
1978

Half the homes in Spokane County, Washington were built in 1978 or earlier (2020-2024 ACS 5-year).

U.S. Census Bureau, 2020-2024 American Community Survey 5-Year Estimates
231,205

Spokane County, Washington holds 231,205 housing units (2020-2024 ACS 5-year).

U.S. Census Bureau, 2020-2024 American Community Survey 5-Year Estimates
64.5%

Owners occupy 64.5% of the occupied homes in Spokane County, Washington (2020-2024 ACS 5-year).

U.S. Census Bureau, 2020-2024 American Community Survey 5-Year Estimates
Code, Licensing, and Efficiency Rules for Central AC Installation in Spokane County, Washington9 sourced rules and standards

What the installation actually looks like

Split-system central air conditioners rated below 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.

U.S. Department of Energy10 CFR 430.32, Energy and water conservation standards and their compliance dates, Electronic Code of Federal Regulations.Verified 2026-09-10

Split-system central air conditioners rated at or above 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.

U.S. Department of Energy10 CFR 430.32, Energy and water conservation standards and their compliance dates, Electronic Code of Federal Regulations.Verified 2026-09-10

Split-system central air conditioners manufactured between January 1, 2015 and December 31, 2022 had to meet 13 SEER, the metric that preceded SEER2.

U.S. Department of Energy10 CFR 430.32, Energy and water conservation standards and their compliance dates, Electronic Code of Federal Regulations.Verified 2026-09-10

Single-package central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.

U.S. Department of Energy10 CFR 430.32, Energy and water conservation standards and their compliance dates, Electronic Code of Federal Regulations.Verified 2026-09-10

Space-constrained central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 11.7 SEER2.

U.S. Department of Energy10 CFR 430.32, Energy and water conservation standards and their compliance dates, Electronic Code of Federal Regulations.Verified 2026-09-10

Federal efficiency standards for split-system central air conditioners and heat pumps are set on each certified combination of outdoor unit and indoor coil rather than on the outdoor unit alone.

U.S. Department of Energy10 CFR 430.32, Energy and water conservation standards and their compliance dates, Electronic Code of Federal Regulations.Verified 2026-09-10

Residential and light commercial air conditioning and heat pump systems assembled in the field, including mini-splits and unitary systems, may not be installed on or after January 1, 2025 using a refrigerant with a global warming potential above 700.

U.S. Environmental Protection AgencyU.S. Environmental Protection Agency, Technology Transitions HFC Restrictions by Sector, implementing the American Innovation and Manufacturing Act.Verified 2026-09-10

A field-assembled system whose specified components were all manufactured or imported before January 1, 2025 carries no installation compliance date under the refrigerant restrictions and may still be installed.

U.S. Environmental Protection AgencyU.S. Environmental Protection Agency, Technology Transitions HFC Restrictions by Sector, implementing the American Innovation and Manufacturing Act.Verified 2026-09-10

Licensing and Legal Requirements in Spokane County, Washington

Washington requires contractor registration rather than an HVAC licence: every contractor must register with the Department of Labor and Industries, and advertising, bidding or working as a contractor without that registration is a gross misdemeanour.

Washington State LegislatureWash. Rev. Code ch. 18.27 (Washington State Legislature)Verified 2026-09-13

Weather Load History: Spokane County

Spokane County's climate puts real demands on cooling equipment over its lifetime. How hard a system has to work, and how long it lasts, depends in part on what the local weather actually does.

Severe weather events by county — Spokane County
2001000
2015201620172018201920202021202220232024
115

663 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.