Water Heater Installation in San Antonio, TX
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What a water heater in Bexar County has to deal with
Winters here are mild. Heat only runs November through March, and winter nights average 43°F, so a water heater in San Antonio isn't fighting hard water temperatures most of the year. The bigger risk is the grid. A third of Texas households went at least 24 hours without power last year, and the county has logged 104 damaging wind events and 5 winter storms over the past ten years. A gas water heater with a standing pilot will keep making hot water through an outage. One that depends on power to ignite will not, until the power comes back.
Whatever model goes in has to meet the federal efficiency minimum, and that minimum isn't one flat number. It's set by a formula based on the tank's rated volume, so a larger tank and a smaller one can face different minimums even when they're the same type of heater.
- 43°F
- the average winter night, and colder incoming water means longer heating
- 5 months
- November through March, the months homes here need heat
- 33%
- of Texas 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 $290 a year to run in Texas compared with an electric water heater.
Estimates for a typical Texas home, from EIA household energy data and Texas fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- The clearest sign is water around the base of the tank. Once a tank starts leaking, it's a sign the tank itself has failed inside, and that doesn't get better. Rusty or metallic-tasting hot water is another sign, especially if it clears up when you run the cold side. Most tank water heaters last a decade or so, so if yours is getting up there in age and starting to make popping or rumbling noises, that's sediment built up on the bottom, and it means the tank is working harder than it should. A unit that's struggling to keep up with hot water like it used to, combined with age, is usually enough reason to have it looked at before it fails on its own.
- Should I switch to a tankless water heater?
- It depends on what you want from your hot water and what your home can support. A tankless unit heats water on demand instead of storing it, so you get a steady supply as long as you're running it, which matters if your household regularly runs out of hot water with a tank. Tankless units also take up much less space and don't carry the risk of a tank failing and leaking gallons of water into your home. Switching usually means changes to the gas line, venting or electrical circuit depending on the model, so it's worth having a contractor look at your setup before deciding.
- What changes when you install a tankless water heater?
- The biggest change is the space it frees up, since a tankless unit mounts on a wall and doesn't need room for a tank. Gas-fired tankless units usually need a larger gas line than a tank-style heater used, because they draw more gas to heat water quickly on demand. Venting is different too, tankless units often require their own dedicated vent rather than sharing one. Some homes need electrical work as well, since even gas tankless units use power to run their controls and ignition. A contractor can look at your gas line, venting and electrical setup to say what your home specifically needs.