AC Installation in Colville, WA
A new air conditioner in Colville will run from July through August every year. Tell us about the house, and a licensed contractor who covers Stevens County will get in touch.
Tell us about the job
It takes about a minute.
Two months of real heat, then long stretches of nothing
Colville only asks a new air conditioner to work through July and August, with afternoons averaging 79°F. That is a short season, but it still needs to be sized and installed right, because a unit that is too big will cool the house fast and shut off before it pulls the moisture out of the air, and one that is too small will run flat out on the hottest days and still not keep up.
Stevens County has also logged 31 damaging wind events and 12 hail events over the past ten years, some with hailstones up to 2 inches across. The outdoor unit sits outside through all of that, so where it goes and how it is set matters. Any new system installed since 2023 has to meet a federal minimum of 13.4 SEER2, so that efficiency level is the starting point, not an upgrade.
- 2 months
- July through August, your air conditioner is on duty
- 79°F
- the average summer afternoon it cools against
- 12 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet

NOAA nClimDiv, 1991–2020 normals
Going above the federal minimum saves little here, about $20 a year.
Estimates for a typical Stevens County home, from EIA household energy data, Washington fuel prices and NOAA climate normals. Your home will differ.
Washington requires contractors to register with the state.
That registration puts the business on file with the state. It does not come with a trade exam, and the state does not test the contractor's skill to get it or track how the installation turns out. It tells you the business is on record. It does not tell you the job was done right.
For an air conditioner install in Stevens County, the protection that actually covers the work is the permit. In most cities and counties, replacing an air conditioner needs a permit from the local building office and an inspection once the work is finished. That inspection is what checks the installation, not the state registration.
Source: Washington State Legislature
- What size air conditioner does my house need?
- The right size depends on how big your house is, how much shade and insulation it has, and how many windows face the sun. A contractor works this out with a load calculation, not a rule of thumb based on square footage alone. Putting in one that's too big cools the house fast but shuts off before it pulls the moisture out of the air, so rooms feel damp. With cooling season here running July through August, getting the size right matters less for comfort over months and more for how well it handles those two months of real heat.
- Should I replace the whole system or just the outdoor unit?
- If your indoor coil and outdoor unit were installed together and are close in age, replacing just the outdoor unit usually causes problems. The coil and the condenser are matched to work at a specific capacity, and pairing an old coil with a new condenser can mean poor cooling or a system that wears out early. Some manufacturers won't warranty a new condenser paired with an old coil at all. A contractor can look at both parts and tell you whether a full system swap or a single component makes sense for what you have.
- Do HVAC contractors in Colville need a state license to work on my home?
- Washington doesn't issue a trade license for HVAC work. Contractors register with the Department of Labor and Industries, which is a business record showing they're bonded and insured, not a test of skill. You'll also need a permit from the local building office for an air conditioner installation, and the work gets inspected once it's done. Ask to see the contractor's registration and make sure the permit gets pulled before the job starts.


