Water Heater Installation in Beaver Dam, WI
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What a Beaver Dam winter asks of a water heater
Winter nights here average 14°F from December through February, and homes need heat from October through May, eight months a year. Incoming water is cold along with everything else in that stretch, and a water heater has to make up more ground to reach the temperature you set.
Power doesn't always stay on through a storm. Dodge County has logged 18 winter storms and 79 damaging wind events over the past ten years, and 18% of households in Wisconsin went at least 24 hours without power in 2024. A gas water heater with a standing pilot keeps making hot water through an outage. One with electronic ignition, gas or electric, comes back on by itself once power returns.
Whatever size and type you choose, the federal minimum efficiency it has to meet is set by a formula based on the tank's rated volume, applied separately across four draw patterns. Two tanks of the same type but different size can be held to different minimums.
- 14°F
- the average winter night, and colder incoming water means longer heating
- 8 months
- October through May, the months homes here need heat
- 18%
- of Wisconsin households lost power for a day or more in 2024, and a heater with an electric element or electric ignition stops without it
NOAA nClimDiv, 1991–2020 normals
A heat pump water heater would save about $330 a year to run in Wisconsin compared with an electric water heater.
Estimates for a typical Wisconsin home, from EIA household energy data and Wisconsin fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- The clearest sign is water that comes out lukewarm or runs out fast even when nothing else changed. Rust colored water, a tank that's rusting on the outside, or water pooling underneath it means the tank itself is failing, not just a part inside it. A popping or rumbling sound during heating points to sediment built up on the bottom, which gets worse over time and makes the tank work harder. Most tanks last a decade or so, and once one starts leaking from the tank itself, it needs to be replaced rather than repaired.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not just on your current tank failing. A tankless unit heats water as it's used instead of storing it, so you don't run out during a long shower or back to back loads of laundry. It also takes up much less space than a tank, which matters if yours is in a closet or tight utility area. The tradeoff is that a tankless unit needs enough gas supply or electrical capacity to fire up on demand, so a contractor needs to check what your home can support before you decide.
- What changes when you install a tankless water heater?
- The biggest change is that hot water becomes limited by flow rate instead of tank size. A tankless unit can supply hot water to more than one fixture at once as long as the combined flow stays under what it's rated for, but push past that and the water runs cooler rather than running out. Venting is different too, since a tankless unit vents through a different type of pipe than a tank does, which sometimes means new venting has to be run. A contractor will look at your gas line or electrical circuit before installing one, since a tankless unit draws more at the moment it fires than a tank does.