Furnace Installation in Watertown, WI
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Jefferson County will get in touch.
Tell us about the job
It takes about a minute.
What Watertown winters ask of a new furnace
Your furnace has to work here from October through May. That's eight months of the year, longer than most places, and winter nights average 15°F. A furnace sized and installed right for that stretch matters more here than somewhere it only runs a few months.
Most homes in Jefferson County heat with gas, and any non-weatherized gas furnace built since November 2015 has to hit at least 80 percent AFUE by federal rule. That's the floor, not a feature to look for. The bigger question for a new install is whether it's set up to run that many months without strain, since the parts that light the burner and move the heat see a lot of cycles over an eight month season.
- 8 months
- October through May, your furnace is on duty
- 15°F
- the average winter night it heats against
- 67%
- of homes here heat with gas, so most furnaces here burn gas
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A high-efficiency gas furnace would save about $90 a year to run in Jefferson County compared with a gas furnace.
Estimates for a typical Jefferson 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 Department of Safety and Professional Services. Nobody tested the contractor's furnace work to get it, and there's no exam behind it. It also means Jefferson County can't layer its own HVAC license on top, so this registration is the only state-level record you'll find on whoever you hire.
What actually stands behind a furnace installation here is the permit. In most cities and counties, putting in a new furnace requires a permit from the local building office, and the work gets inspected once it's done. That inspection is what catches a bad gas connection, which is the part of this job that can hurt someone. With 67.1% of homes in Jefferson County heating with gas, that inspection is doing real work, not just paperwork.
Sources: Wisconsin Legislative Reference Bureau · Wisconsin Department of Safety and Professional Services
- What size furnace does my house need?
- The right size depends on your home's square footage, how well it's insulated, your window count and type, and your ceiling height. A furnace that's too big will short cycle, turning on and off before it heats evenly, and one that's too small will run constantly and still leave rooms cold. A contractor works this out with a load calculation that looks at your specific house, not a chart based on square footage alone. With winter lows here averaging 15°F, getting this number right matters more than it would somewhere milder.
- How do I know it's time to replace my furnace?
- Age is the first thing to check. Most furnaces last 15 years or more, and past that point repairs get more frequent and the risk of a breakdown on a cold night goes up. Watch for rising gas bills without a clear reason, rooms that heat unevenly, or a furnace that cycles on and off more than it used to. If you're calling for repairs more than once a season, replacing it usually makes more sense than continuing to patch it, especially with heat needed here from October through May.
- Is a high-efficiency furnace worth it?
- It depends on what you have now and how long you plan to stay in the house. Furnaces made since November 2015 are already required to hit at least 80 percent AFUE, so the real choice is between that baseline and a furnace rated higher. A more efficient furnace wastes less gas as heat that goes out the flue, which matters here since 67.1% of homes heat with gas and the season runs eight months a year. A contractor can walk through the options for your house and what each one costs installed.