Water Heater Installation in Mankato, MN
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A new water heater here has to handle a long cold season and the chance of losing power
Winter nights here average 10°F from December through February, and homes need heat from October through May, 8 months of the year. A water heater installed here runs through all of that, working the same whether the house around it is warm or not.
Blue Earth County has seen 36 winter storms and 50 damaging wind events over the past ten years, and in 2024, 13% of Minnesota households lost power for 24 hours or more. A standing pilot gas water heater does not use power at all, so it will keep running through an outage. Electric models and gas units with electronic ignition come back on by themselves once power returns.
- 10°F
- the average winter night, and colder incoming water means longer heating
- 8 months
- October through May, the months homes here need heat
- 13%
- of Minnesota 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 $360 a year to run in Minnesota compared with an electric water heater.
Estimates for a typical Minnesota home, from EIA household energy data and Minnesota fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- Age is the first thing to check. Most tank water heaters last around a decade, and once you're past that, a repair is often just delaying the same decision. Watch for water pooling at the base, since that usually means the tank itself is failing, not a part inside it. Rusty water from the hot tap, popping or rumbling sounds, and hot water that runs out faster than it used to are all signs the tank is on its way out rather than something a technician can adjust.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on your tank failing. A tankless unit heats water as you use it 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. Against that, a tankless unit usually needs a larger gas line or dedicated electrical circuit than what's already run to your current water heater, so the installation is more involved. A contractor can look at your gas line, venting and electrical setup and tell you what switching would actually require in your house.
- What changes when you install a tankless water heater?
- The biggest change is what feeds it. A tankless unit needs more gas flow at once than a tank does, so the gas line often has to be upsized, and venting requirements are different too since the unit fires on demand instead of holding a standing pilot or cycling like a tank. Electric tankless units draw enough power that they may need a new dedicated circuit. None of this means you can't switch, it just means the installation involves more than swapping one unit for another, and a contractor will need to check your gas line, vent path and electrical panel before pricing the job.