Water Heater Installation in Twin Falls, ID
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Nine months of heating asks a lot of your water heater
Twin Falls County homes need heat from September through May, nine months of the year, with winter nights averaging 21°F from December through February. A water heater installed here has to hold up through most of the calendar, not just a few cold weeks.
A new tank also has to meet a federal efficiency minimum, but that minimum isn't one number. It's set by a formula based on the tank's rated volume, applied separately across four draw patterns, so two heaters of the same type can face different minimums depending on size. Whoever installs yours needs to size it against how your household draws hot water, not just match the type you had before.
- 21°F
- the average winter night, and colder incoming water means longer heating
- 9 months
- September 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?
- Water pooling at the base of the tank is the clearest sign, since that usually means the tank itself has failed and it will not stop. Rusty hot water, a tank making popping or rumbling noises, or hot water running out faster than it used to are the other signs worth paying attention to. Most storage tank water heaters last a limited number of years, and once one starts showing these signs near the end of that range, repairing it is rarely worth it. A contractor can look at the age and condition of the tank and tell you whether it makes sense to repair or replace.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on any rule that says one type is better. A tankless unit heats water as you use it instead of storing it, so you do not run out of hot water partway through back to back showers or a load of laundry after dishes. It also does not sit there keeping a tank of water hot all day when nobody is using it. Against that, a tankless unit costs more to install than a like for like tank replacement, and not every home's gas line or electrical setup is already sized for one. A contractor can look at your home's setup and tell you what switching would actually involve.
- What changes when you install a tankless water heater?
- The unit itself is smaller and mounts on a wall instead of taking up floor space, which matters if the old tank was in a tight closet or utility room. Gas fired tankless units need enough gas supply and venting for their higher burner output, which can mean upsizing the gas line or adding new venting where the tank never needed it. Electric tankless units draw a large amount of power for a short time, which can call for a bigger electrical circuit than the old tank used. Because of these changes, a tankless installation almost always needs the same permit and inspection a tank replacement would, and a contractor should check your home's gas line, venting and electrical before quoting the job.