Water Heater Installation in Rexburg, ID
Tell us about the house, and a licensed contractor who covers Madison County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of use and nights near 14 degrees
Water heaters in Rexburg work almost year round. Homes here need heat from September through June, and the same cold that keeps your furnace running pulls heat out of your water tank too. On winter nights averaging 14°F, incoming water is colder and the tank has to work harder to hold temperature.
Storms are part of the picture too. Madison County has seen 103 winter storms and 60 damaging wind events over the past ten years, and across Idaho about 11% of households lost power for a full day or more in 2024. A gas water heater with a standing pilot will keep running through an outage. One with electronic ignition will not light again until power is back. Whatever you install, it has to meet the federal minimum efficiency for its size, which is set separately for each tank volume rather than as one flat number.
- 14°F
- the average winter night, and colder incoming water means longer heating
- 10 months
- September through June, 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 water pooling around the base of the tank, since that means the tank itself is failing and won't be fixed. Rusty hot water, popping or rumbling sounds from the tank, or hot water that runs out faster than it used to are also signs the tank is near the end. A tank that fails fully can dump its whole contents at once, so it's worth having a contractor look at it as soon as you notice any of these rather than waiting for it to quit.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on any problem with your current tank. A tankless unit heats water on demand instead of storing it, so you don't run out partway through a shower, and it takes up far less space than a tank. It also needs gas or electric service sized for the unit, and venting built for it, so it isn't a straight swap into the same spot your tank sits in now. A contractor can tell you what your home's gas line and venting would need to support one.
- What changes when you install a tankless water heater?
- The biggest change is the gas line and venting, since a tankless unit needs more gas flow than a tank does and vents differently. The unit mounts on a wall instead of sitting on the floor, so the old tank's spot opens up for other use. It also means no standing pilot burning gas around the clock, since a tankless unit fires only when you open a hot tap. Because gas line, venting and electrical all factor in, a contractor needs to look at the specific house before saying what the install involves there.