HVAC Installation in Fond du Lac, WI
A new system here will heat from September through May and cool from June through August every year. Tell us about the house, and a licensed contractor who covers Fond du Lac County will get in touch.
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Twelve months of work for a new system in Fond du Lac County
Homes here need heat from September through May and cooling from June through August. That is 12 months a year with the furnace or the air conditioner doing real work, not sitting idle most of the time. On winter nights averaging 13°F, a furnace has to hold that line night after night for months, so the equipment you choose needs to be sized for that cold, not for a mild average.
Wisconsin has seen 15 winter storms and 59 damaging wind events over the past ten years, and in 2024, 18% of households in the state went at least 24 hours without power. A furnace with electronic ignition will not run without power even if the gas is on, so it is worth asking your contractor how the system you choose handles an outage.
- 9 months
- September through May, your system heats
- 3 months
- June through August, it cools
- 13°F
- the average winter night it heats against
- 79°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. Nobody tested the contractor's trade knowledge to get it, and no state agency is vouching for the work. Wisconsin also does not let counties or cities layer their own HVAC license on top, so this registration is the only state-level record that exists for the person installing your system.
For a job like this, what actually stands behind the work is local. In most cities and counties, an installation like this needs a permit from the local building office, with an inspection once the work is done. That inspection is where the gas connections and the rest of the installation get looked at by someone other than the contractor who did the work.
Sources: Wisconsin Legislative Reference Bureau · Wisconsin Department of Safety and Professional Services
- When should I replace my HVAC system?
- Once your furnace or air conditioner is past 15 years old and starting to need repairs more than once a season, replacing it makes more sense than fixing it again. Watch for uneven heating room to room, a furnace that runs longer to hit the same temperature, or a jump in energy bills with no other explanation. Homes here need heat from September through May, so a furnace that fails mid-winter is a real problem, not just an inconvenience. If yours is getting old, it's worth having a contractor look at it before the cold sets in rather than after it quits.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, and here's why. A furnace and air conditioner installed together are matched to work as a system, and pairing a new unit with an old one can mean the new one never runs at its rated efficiency. It also means dealing with one project instead of two, since the same ductwork and space are involved either way. If only one is failing and the other is still fairly new, a contractor can tell you whether replacing just the one makes sense for your setup.
- What happens during an HVAC installation?
- A contractor first removes the old furnace or air conditioner and checks the ductwork, electrical connections, and venting to see what needs to change for the new equipment. The new unit gets set in place, connected to the ducts, gas or electric line, and condensate drain, then tested to make sure it's heating or cooling correctly and running safely. For a furnace, that includes checking the vent hood and the igniter. For an air conditioner, it means checking refrigerant levels and the outdoor coil. Wisconsin requires contractors to register with the Department of Safety and Professional Services, so it's worth confirming that before work starts.