Water Heater Installation in Boise City, ID
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Ada County asks a lot of a water heater
Winter nights here average 25°F from December through February, and homes run their heat from October through May, eight months of the year. Cold water coming into the tank means the heater works harder to bring it up to temperature, for most of the year.
Power is part of it too. Idaho saw 11% of households lose power for 24 hours or more in 2024, and the region has logged 27 winter storms and 41 damaging wind events over the past ten years. A new install is a chance to plan for that, not just replace what failed. And sizing matters more than it looks like on paper. The federal efficiency minimum for storage water heaters isn't one number, it's a formula based on the tank's rated volume, applied differently across draw patterns, so two tanks of the same type can carry different minimums depending on size.
- 25°F
- the average winter night, and colder incoming water means longer heating
- 8 months
- October through May, the months homes here need heat
- 11%
- of Idaho 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 $350 a year to run in Idaho compared with an electric water heater.
Estimates for a typical Idaho home, from EIA household energy data and Idaho fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- The clearest sign is age combined with trouble. If your water heater is old and you're seeing rust-colored water, rust on the outside of the tank, or water pooling underneath, that's a tank on its way out rather than something worth repairing. A popping or rumbling sound during heating usually means sediment has built up inside, and that only gets worse over time. If the unit is still fairly new and the only complaint is not enough hot water, a contractor can often fix that without replacing the whole thing.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on your current heater being broken. A tankless unit heats water as it flows through instead of storing it, so you don't run out partway through a shower the way you can with a tank. It also takes up less space and tends to last longer than a tank unit. Switching means changes to the gas line and venting, and sometimes the electrical setup too, so it's worth having a contractor look at your home before you decide.
- What changes when you install a tankless water heater?
- The unit itself is smaller and mounts on a wall instead of sitting on the floor, which frees up the space a tank used to take. Because it heats water on demand rather than storing it, it usually needs a larger gas line to deliver enough fuel for that burst of heating, and its venting is different from a tank's. This kind of installation needs a permit and inspection here, and a contractor will know what your specific gas and venting setup requires to meet code.