AC Installation in Detroit, MI
A new air conditioner in Detroit will run from June through August every year. Tell us about the house, and a licensed contractor who covers Wayne County will get in touch.
Tell us about the job
It takes about a minute.
Three months of real heat, every summer
Wayne County summers are short but they push hard. June through August, afternoons average 82°F, and that's the stretch your air conditioner has to cover without a break.
Any new central air conditioner installed here has to meet 13.4 SEER2, the federal minimum since 2023. That's the floor. What size and what beyond that floor makes sense depends on your house, but the unit going in has to clear that bar no matter what.
- 3 months
- June through August, your air conditioner is on duty
- 82°F
- the average summer afternoon it cools against
- 23 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
A higher-efficiency unit would save about $30 a year to run in Wayne County compared with a new unit at the federal minimum.
Estimates for a typical Wayne County home, from EIA household energy data, Michigan fuel prices and NOAA climate normals. Your home will differ.
Michigan requires HVAC contractors to hold a state license.
The Board of Mechanical Rules issues that license, and it covers the contractor rather than any single job. That license stays with the contractor, not with any one address or job, and it is on record with the state.
For an air conditioner installation, that license is what stands behind the contractor doing the work. In most cities and counties here, the job also needs a permit from the local building office, with an inspection once the work is done. The license says who is allowed to do the work. The permit and inspection say the finished installation meets code at your house.
Sources: Michigan Legislature · Michigan Department of Licensing and Regulatory Affairs
- What size air conditioner does my house need?
- There's no single number that fits every house. Going by square footage alone gets it wrong more often than not. The right size depends on your home's insulation, how many windows you have and which way they face, your attic and ductwork, and even the height of your ceilings. A contractor works this out with a load calculation, checking the house room by room rather than guessing from a chart. Getting this right matters more than most people think. Too big and the unit cools the air fast but shuts off before it pulls the humidity out, leaving the house feeling clammy. Too small and it runs nonstop on the hottest days and never quite catches up.
- Should I replace the whole system or just the outdoor unit?
- In most cases, if the outdoor unit is failing, the indoor coil and furnace or air handler should be looked at too before deciding. Matching a new outdoor unit to an old indoor coil can hurt efficiency and sometimes voids the warranty on the new equipment, since manufacturers pair specific models together. If your system is old enough that one major part is failing, the other parts have logged the same years and the same summers. A contractor can check the age and condition of what's still working and tell you whether it makes sense to pair new with old or replace the set.
- Do HVAC contractors in Detroit need a state license to work on my home?
- Yes. Michigan requires HVAC contractors to hold a state license, issued by the Board of Mechanical Rules. Ask to see the license number before work starts. You can confirm it's current through the state. Working with a licensed contractor also means the work is being done to code, which matters for insurance and for resale down the road.