A snow-covered two-story house at night during a blizzard, with one illuminated upstairs window.

HVAC Installation in Whitewater, WI

A new system here will heat from October through May and cool 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 unfinished basement containing a metal furnace with ductwork, exposed wooden joists on the ceiling, cardboard boxes, a coiled cable, and a single hanging incandescent bulb.

Eleven months of the year, your system is working

Winter nights around Whitewater average 16°F from December through February, and that stretch runs from October through May, eight months of heat. Summer afternoons average 81°F for the three months after that. Only a few weeks a year ask nothing of a new system.

A new furnace here has to hold up through a season that starts before Halloween and doesn't let go until May, and a new air conditioner has to answer real heat once summer comes. Most homes in the area heat with gas, and whatever you install has to meet the federal minimum efficiency standard for that equipment. Walworth County has also seen its share of winter storms and damaging wind, the kind that knock out power. If part of what you're installing depends on electricity to run, that's worth planning for too.

8 months
October through May, your system heats
3 months
June through August, it cools
16°F
the average winter night it heats against
81°F
the average summer afternoon it cools against
Isometric line illustration of a cutaway single-story house with a dark shingled roof, showing interior rooms and ductwork connected to a gray furnace unit with a flue pipe.
Your system heats October through May and cools June through August.

NOAA nClimDiv, 1991–2020 normals

Wisconsin requires contractors to register with the state.

That registration puts the business on file with the Department of Safety and Professional Services. Nothing more. There is no trade exam behind it, so it does not test what a contractor knows about sizing a system, running a gas line, or charging refrigerant. Wisconsin also does not let Walworth County or any city in it require its own HVAC license, so this registration is the only state-level record you get anywhere in the state.

For this installation, the protection comes from the local building office instead. In most cities and counties, replacing a furnace, air conditioner, or heat pump needs a permit before the work starts and an inspection once it is done. That inspection is where a bad gas connection or a wiring mistake gets caught by someone other than the person who did the work.

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

When should I replace my HVAC system?
Replace it when repairs keep piling up or the system can't keep the house warm through a cold winter night. A furnace that's short-cycling, one that needs a new heat exchanger or blower motor, or one that's just old and struggling is not worth patching again. Homes here need heat eight months of the year, October through May, so a furnace on its last legs will get tested hard and soon. If a contractor tells you the repair cost is close to a new system, that's your answer.
Should I replace my furnace and air conditioner at the same time?
If both are old, yes, it usually makes sense to do them together. A furnace and AC installed at the same time are matched to work with each other, and the coil sits right on top of the furnace, so pulling one apart often means touching the other anyway. If your furnace is much newer than your AC, or the other way around, there's no reason to replace the one that's still got years left in it. A contractor can look at the age and condition of each and tell you honestly whether they should go together.
What happens during an HVAC installation?
A contractor removes the old furnace and or air conditioner, sets the new equipment in place, and connects it to the ducts, gas line or electrical circuit, and condensate drain that are already there. The refrigerant lines get connected and checked for leaks, the gas or electrical connections are tested, and the thermostat gets wired in and set up. Before the job is done, the contractor runs the system through a full cycle, heat and cooling, to check that it's holding the right temperature and not throwing any error codes. Wisconsin requires HVAC contractors to register with the Department of Safety and Professional Services, so ask to see that before work starts.