Water Heater Installation in Indianola, IA
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What a Warren County winter asks of a water heater
Your water heater works through eight months of cold, October to May, with winter nights averaging 17°F. The incoming water is colder for longer here, so the tank spends more of the year heating from a lower starting point than it would somewhere with a short winter.
Storms are part of the picture too. Warren County has seen 21 winter storms and 66 damaging wind events over the past ten years, and 15% of Iowa households lost power for at least a day in 2024. A gas water heater with a standing pilot keeps working through an outage. One that depends on power for ignition does not, until the power is back.
A new tank also has to meet the federal efficiency minimum for its size and type, which is set by formula rather than one flat number. A licensed installer will size the unit to the household and match it to that standard.
- 17°F
- the average winter night, and colder incoming water means longer heating
- 8 months
- October through May, the months homes here need heat
- 15%
- of Iowa 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 $280 a year to run in Iowa compared with an electric water heater.
Estimates for a typical Iowa home, from EIA household energy data and Iowa fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- The clearest sign is water that never quite gets hot, or runs out fast even when nobody used much. Rust colored water from the hot tap, a tank that's rusting on the outside, or puddles forming around the base all point to a tank on its way out. Most storage water heaters last a decade or so, and once one starts needing repairs it tends to need them again. If yours is old and struggling, a contractor can tell you whether it's worth fixing or time to install a new one.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on anything wrong with a tank. A tankless unit heats water only when you're running a tap, so you don't pay to keep a tank of water hot around the clock, and you don't run out of hot water partway through a shower. It also takes up less space and can last longer than a storage tank. Against that, installing one usually means changes to gas line, venting, or electrical that a storage tank replacement doesn't need. A contractor can look at your home and tell you what switching would actually involve.
- What changes when you install a tankless water heater?
- The unit itself is much smaller, usually mounted on a wall instead of sitting on the floor, so you get that floor space back. Because it heats water on demand instead of storing it, the gas line, vent, and sometimes the electrical supply often need to be upsized to handle the burst of energy it uses when it fires up. That usually means more work at install time than swapping one tank for another. It's also worth checking with the local building office, since installing a water heater typically needs a permit and an inspection when the work is done.


