HVAC Installation in Manitowoc, WI
A new system here will heat from September through May and cool from July through August every year. Tell us about the house, and a licensed contractor who covers Manitowoc County will get in touch.
Tell us about the job
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A system that has to work most of the year
Your furnace has nine months of work ahead of it here, September through May, with winter nights that average 15°F from December through February. That kind of cold means long runtimes and a lot of cycles, and a new furnace needs to be sized to recover heat fast on those nights, not just keep up on the mild ones. Summers are short by comparison, two months of afternoons averaging 77°F, but the air conditioner still needs to be matched to the furnace so both run the way they were designed to.
Manitowoc County homes also see real storm weather, 25 winter storms and 52 damaging wind events over the last ten years. Wisconsin households lost power for a day or more at a rate of 18% in 2024, and a furnace with a standing pilot will keep running through an outage while one with electronic ignition will not fire until power is back. That is worth knowing before you choose a system, especially if you are on gas heat like most homes here.
- 9 months
- September through May, your system heats
- 2 months
- July through August, it cools
- 15°F
- the average winter night it heats against
- 77°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Wisconsin requires contractors to register with the state.
That registration puts the business on file with the state, nothing more. Nobody tests the contractor on how to size a system, run a gas line or set refrigerant charge before handing out that number. Wisconsin also keeps counties and cities from layering their own HVAC license on top, so the registration is the only state record you get anywhere in the state, and it looks the same in Manitowoc County as it does everywhere else.
For a job like this, the protection comes from elsewhere. In most cities and counties here, putting in a new furnace, air conditioner or heat pump needs a permit from the local building office, with an inspection once the installation is done. That inspection is what catches a bad connection or an unsafe hookup, not the registration on file in Madison.
Sources: Wisconsin Legislative Reference Bureau · Wisconsin Department of Safety and Professional Services
- When should I replace my HVAC system?
- Once repairs start happening every year, or the system can't keep the house at 15°F outside without struggling, replacement is usually the better move. An older furnace working through nine months of heating a year has a lot more hours on it than one in a milder climate, so parts wear faster here. If your gas or electric bills have been climbing while the equipment gets old, that's another sign it's losing efficiency. A contractor can look at the age and condition of your system and tell you whether another repair makes sense or whether you're just delaying the inevitable.
- Should I replace my furnace and air conditioner at the same time?
- If both units are close in age, replacing them together often makes sense, but it depends on the condition of each one. A furnace and air conditioner installed at the same time tend to wear out around the same time too, so if your furnace is failing, your air conditioner may not be far behind. They also need to be matched to work correctly together. That said, if one unit is much newer than the other, a contractor can tell you whether it's worth keeping for now or replacing both at once.
- What happens during an HVAC installation?
- A contractor removes the old equipment, sets the new furnace, air conditioner, or both, and connects them to your existing ductwork, gas line, and electrical or refrigerant lines. They check that the new equipment is sized correctly for your house, since a unit that's too big or too small won't heat or cool evenly. Once it's connected, they test the system to make sure it starts up, runs, and shuts off the way it should. In Wisconsin, contractors doing this work register with the Department of Safety and Professional Services.