Wyoming HVAC Match
An outdoor air conditioning condenser unit mounted on a concrete pad next to a blue-sided residential house at sunset.

AC Installation in Cheyenne, WY

A new air conditioner in Cheyenne will run from July through August every year. Tell us about the house, and a licensed contractor who covers Laramie County will get in touch.

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

Two months of real heat, and a lot of hail before and after

Cheyenne only asks a central air conditioner to work hard for about two months, July and August, with afternoons averaging 82°F. That is a short season, but the unit still needs to be sized right for those weeks so it keeps up when the heat is actually there.

What the season does not spare you is the weather around it. Laramie County saw 369 hail events and 1,869 damaging wind events over the last ten years, with a hailstone as large as 4.25 inches. The outdoor unit sits outside through all of that, so the condenser coil and fan need to hold up to hail and wind, not just push cool air in August. Any new system installed now also has to meet the federal minimum of 13.4 SEER2.

2 months
July through August, your air conditioner is on duty
82°F
the average summer afternoon it cools against
369 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 line illustration of a cutaway house showing interior rooms, a furnace or air handler with ductwork, and an outdoor condenser unit beside the building.
Your air conditioner works hardest from July through August.

NOAA nClimDiv, 1991–2020 normals

An outdoor air conditioning condenser unit positioned on a concrete pad next to a blue-sided house, surrounded by green shrubs and flowering hydrangeas at sunset.

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

  • A higher-efficiency unit$130 a year
  • A new unit at the federal minimum, 13.4 SEER2$140 a year

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

What size air conditioner does my house need?
The right size comes from a load calculation, not a chart based on square footage alone. A contractor measures your windows, insulation, ceiling height, and how much shade your house gets, then works out how much heat it gains on a hot afternoon. An oversized unit cools the air fast but shuts off before it pulls the humidity down, so the house feels clammy. An undersized one runs constantly during those July and August afternoons and never quite catches up. Have a contractor do the calculation for your specific house rather than guessing from the old unit's size.
Should I replace the whole system or just the outdoor unit?
If your indoor coil and outdoor unit are matched and the coil is still in good shape, replacing just the outdoor unit can work. But the two are engineered to work together, and pairing a new outdoor unit with an old indoor coil can mean the system never reaches its rated efficiency. Age matters too. If the indoor coil is old enough that it's close to failing on its own, replacing both at once avoids paying for labor twice within a short span. A contractor can check whether your existing coil is compatible with a new outdoor unit before you decide.
Do HVAC contractors in Cheyenne need a state license to work on my home?
Ask to see a contractor's license number before signing anything, and check that it's current. A licensed contractor also carries the insurance that protects you if something goes wrong during installation. If a contractor won't show you a license, look elsewhere.
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