Idaho HVAC Pros
Overhead view of an air conditioning condenser unit on a concrete pad next to a house with asphalt shingle roofing and vinyl siding.

AC Installation in Moscow, ID

Tell us about the house, and a licensed contractor who covers Latah County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An outdoor central air conditioning unit mounted on a concrete pad beside a blue-sided house at sunset.

Moscow doesn't ask much of an air conditioner

Summer afternoons here average 79°F. That's mild, and a new air conditioner in Latah County isn't working against long stretches of heat the way units do further south.

If you're installing new, the unit still has to meet the federal minimum of 13.4 SEER2, the standard that took effect in 2023. Beyond that, getting the size right for your house matters more here than chasing extra capacity you won't use most days.

79°F
the average summer afternoon it cools against
2 hail events
in ten years, and hail bends the fins on outdoor coils
13.4 SEER2
the federal minimum any new unit must meet
Isometric cutaway illustration of a house showing interior ductwork, an air handler and furnace unit, and an outdoor condenser connected by lines outside the wall.
Your air conditioner works hardest from July through August.

NOAA nClimDiv, 1991–2020 normals

An outdoor air conditioning condenser unit installed beside the exterior wall of a blue vinyl-sided house at sunset.

Going above the federal minimum saves little here, about $10 a year.

  • A higher-efficiency unit$50 a year
  • A new unit at the federal minimum, 13.4 SEER2$60 a year

Estimates for a typical Latah County home, from EIA household energy data, Idaho fuel prices and NOAA climate normals. Your home will differ.

Idaho requires HVAC contractors to hold a state license.

The state license comes from the HVAC Board, and it covers the contractor, not the specific job. That means the board has tested this contractor and keeps a record of them, but a license in hand does not mean this particular installation gets checked by anyone at the state level.

That check comes from the local building office instead. In most cities and counties here, putting in a new air conditioner needs a permit before the work starts and an inspection once it is done. The inspection is what confirms this installation was done right, separate from whatever the state already knows about the contractor doing it.

Sources: Idaho Legislature · Idaho Division of Occupational and Professional Licenses

What size air conditioner does my house need?
The right size depends on your square footage, your ceiling height, how much shade and sun your walls and windows get, and how well the place is insulated. This isn't something to guess at or figure from a chart. A contractor will do a load calculation on your actual house and size the unit to match. Going too big is just as bad as too small. An oversized unit cools the air fast then shuts off before it pulls the humidity out, leaving the house feeling clammy.
Should I replace the whole system or just the outdoor unit?
If your indoor coil and outdoor unit were installed together and matched for size and refrigerant, replacing only the outdoor unit can cause problems. A mismatched coil can leave you short on capacity or hard on the compressor, even if the new unit is rated higher. Age matters too. If the indoor coil is old, it may not hold up once paired with new equipment. A contractor can check whether your coil is a safe match before deciding.
Do HVAC contractors in Moscow need a state license to work on my home?
Yes. Idaho requires HVAC contractors to hold a state license, issued by the state's HVAC Board. For an AC installation, you'll also likely need a permit from the local building office, with an inspection once the work is done. Ask to see the license before work starts, and confirm the permit gets pulled.
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