Water Heater Installation in Phoenix, AZ
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What a Phoenix installation has to account for
A new water heater still has to meet a federal minimum efficiency, and that minimum is not one number for every tank. It is a formula based on the tank's rated volume, applied differently across four draw patterns, so two households with different sized tanks are held to different minimums. A contractor sizing your replacement has to work from your tank size and that formula together.
Power loss is worth planning around too. Statewide, 7% of households went at least 24 hours without power in 2024. If you are choosing between a gas and an electric unit, that is part of the decision.
- 41°F
- the average winter night, and colder incoming water means longer heating
- 5 months
- November through March, the months homes here need heat
- 7%
- of Arizona 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 $250 a year to run in Arizona compared with an electric water heater.
Estimates for a typical Arizona home, from EIA household energy data and Arizona fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- Check the data plate for the age first, since a tank that's getting old is more likely to fail without warning. Water pooling at the base usually means the tank itself is rusting from the inside, and that's not something a part swap fixes. Rusty hot water, a burning smell, or hot water that runs out faster than it used to are also signs the tank is failing. A unit that needs a repair every year is costing more in visits than a replacement would.
- Should I switch to a tankless water heater?
- It depends on what you want out of it. 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. Whether it's worth switching for your house is a question a contractor can answer once they see your gas line, venting, and how much hot water your household actually uses.
- What changes when you install a tankless water heater?
- The biggest change is that hot water is made on demand instead of stored and kept hot around the clock. That means no tank sitting in the garage or closet, but it also means the gas line and venting, and sometimes the electrical hookup, may need to be upsized to handle the burner. A tankless unit needs a spot on or near an exterior wall for venting, which can mean rerouting pipe if the water heater moves from where the tank used to sit. A contractor has to look at the existing setup before saying what the job involves.