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

AC Installation in Whitewater, WI

A new air conditioner in Whitewater will run from June through August every year. Tell us about the house, and a licensed contractor who covers Walworth 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 positioned beside a blue-sided house at sunset.

Three months of real heat is what your new AC has to handle

Whitewater doesn't ask an air conditioner to run year round. Cooling season here runs June through August, with summer afternoons averaging 81°F. A new system needs to handle that stretch well, not idle through most of the year.

Hail and wind show up in the record too, 43 hail events and 74 damaging wind events over the last ten years, with hail up to 2.5 inches. Whatever unit goes in should be able to sit outside through that. Any new central air conditioner installed today also has to meet a federal minimum of 13.4 SEER2, so that baseline is already built into what you're offered.

3 months
June through August, your air conditioner is on duty
81°F
the average summer afternoon it cools against
43 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 with ductwork, an indoor air handler, and an outdoor condenser unit connected by lines, on a white background.
Your air conditioner works hardest from June 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 $20 a year.

  • A higher-efficiency unit$160 a year
  • A new unit at the federal minimum, 13.4 SEER2$180 a year

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

Wisconsin requires contractors to register with the state.

That registration puts the business on file with the state. Nobody tested the contractor's work, and there is no trade exam behind the paperwork. Counties and cities in Wisconsin cannot layer on their own HVAC license, so the registration is the same in Walworth County as it is anywhere else in the state.

For an air conditioner installation, the protection that matters comes from the local building office. Most cities and counties require a permit for this job. An inspector checks the work once it's done, and that inspection is what stands behind the installation, not the contractor's registration.

Sources: Wisconsin Legislative Reference Bureau · Wisconsin Department of Safety and Professional Services

What size air conditioner does my house need?
There's no single answer without a contractor working through the actual numbers for your house. Sizing depends on square footage, how many windows you have and which way they face, your insulation, and your ceiling height. A unit that's too big cools the air fast but shuts off before it pulls the humidity out, and one that's too small runs constantly and still can't keep up on the hottest afternoons. A contractor will do a load calculation on the house itself rather than guess from a chart.
Should I replace the whole system or just the outdoor unit?
If your indoor coil and outdoor unit weren't installed together, replacing just the outdoor unit can cause problems. The two are matched for a specific refrigerant charge and airflow, and pairing a new condenser with an old coil often means the system never runs at the efficiency it's rated for. Age matters too. If the indoor coil is old enough that the outdoor unit is failing, the coil is usually close behind it. A contractor can check whether your existing coil is compatible with newer refrigerant and efficiency standards before deciding.
Do HVAC contractors in Whitewater need a state license to work on my home?
Wisconsin requires HVAC contractors to register with the state, through the Department of Safety and Professional Services. Ask to see this before work starts. It's a straightforward way to know you're dealing with someone accountable to the state, not just someone with a truck and a business card.