Oregon HVAC Help
An overhead view of a residential air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

AC Installation in Coos Bay, OR

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

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An outdoor air conditioning condenser unit on a concrete pad next to the gray vinyl siding of a residential home.

Coos Bay doesn't ask much of an air conditioner

Summer afternoons here average 73°F. That's mild by any measure, and it means a new air conditioner in this county will spend most of its life barely working.

A unit installed here still has to meet the same federal efficiency minimum as anywhere else, 13.4 SEER2. With highs this low, sizing it right matters more than chasing extra capacity you'll rarely call on.

73°F
the average summer afternoon it cools against
13.4 SEER2
the federal minimum any new unit must meet
Isometric cutaway illustration of a single-story house showing interior rooms with furniture, attic ductwork connected to an indoor air handler, and an outdoor condenser unit on a pad linked by refrigerant lines.
Your air conditioner works hardest from July through August.

NOAA nClimDiv, 1991–2020 normals

Aerial view of a residential air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding and a sliding glass door.

Going above the federal minimum saves little here, about $0 a year.

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

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

Oregon requires HVAC contractors to hold a state license.

The Construction Contractors Board issues that license, and it belongs to the contractor rather than to any single job. The person or company doing your work has been through the state's process and has a record with the board, not just a name on file. Oregon does carve out an exception for small jobs. Work under $1,000 does not need a licensed contractor. An air conditioner installation runs well past that line, so this is a licensed job.

That license covers who is allowed to take on the work, but it does not replace the inspection your installation still needs. In most cities and counties in Oregon, putting in a new air conditioner requires a permit from the local building office, and an inspector checks the work once it is done. The license tells you the contractor was vetted by the state. The permit and inspection tell you this particular installation was checked, in this county, on this job.

Source: Oregon Legislative Assembly

What size air conditioner does my house need?
It depends on your house, not a rule of thumb. A contractor sizes the unit with a load calculation that looks at your square footage, insulation, window area, and ceiling height. Summer afternoons in Coos Bay only average 73°F, and homes here need cooling zero months a year, so that calculation will point toward a smaller unit than the same house would need somewhere hot. An oversized unit cools the room fast then shuts off before it pulls the moisture out of the air, so bigger is not better here.
Should I replace the whole system or just the outdoor unit?
If your indoor coil and outdoor unit are matched and both working, replacing just the outdoor unit can make sense. But the two have to match, the coil, the airflow, and often the refrigerant type, or the new unit will not run at its rated efficiency and may not run right at all. A contractor can check what you have against what you'd be installing and tell you whether the coil is worth keeping. Any new outdoor unit installed today has to meet the federal minimum of 13.4 SEER2.
Do HVAC contractors in Coos Bay need a state license to work on my home?
Yes. Oregon requires HVAC contractors to hold a state license, issued through the Construction Contractors Board, and that license covers the contractor rather than each individual job. Installing an air conditioner falls well outside the small jobs Oregon lets unlicensed workers do, so this work needs a licensed contractor. You will also need a permit from the local building office, with an inspection once the work is done.