Water Heater Installation in Philadelphia, PA
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What a Philadelphia County winter asks of a water heater
Winter nights here average 27°F from December through February, and homes run their heat from October through April, seven months of the year. A water heater works through all of that too, heating water that starts out colder for months at a stretch, on top of whatever the house draws for showers, laundry, and dishes.
Power matters here as much as temperature. Statewide, 15% of households went at least 24 hours without power last year, and the county has seen 15 winter storms and 151 damaging wind events over the past ten years. A storage tank with a standing pilot keeps making hot water through an outage. One that relies on an igniter will not, though it comes back on its own once power returns. Whatever gets installed has to clear the federal efficiency minimum, which is not one number but a formula tied to the tank's rated volume, applied across four draw patterns, so two tanks of different sizes can face different minimums even if they are the same type.
- 27°F
- the average winter night, and colder incoming water means longer heating
- 7 months
- October through April, the months homes here need heat
- 15%
- of Pennsylvania 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 $400 a year to run in Pennsylvania compared with an electric water heater.
Estimates for a typical Pennsylvania home, from EIA household energy data and Pennsylvania fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- Age is the first thing to check. Most tanks last about 10 years, and past that point the tank itself is more likely to fail than any part in it. Look at the bottom of the tank and around the base for rust or water that was not there before. If it is heating water but making noise, taking longer to recover, or leaking at a fitting, a contractor can tell you whether that fitting or the tank itself is the problem. A tank that is leaking from the tank body, not a valve or connection, needs to be replaced, not repaired.
- Should I switch to a tankless water heater?
- It depends on what you want from it, not just on your old tank failing. A tankless unit heats water on demand instead of storing it, so it does not run out partway through back to back showers the way a tank can. It also takes up less space and can last longer than a tank if it is sized and installed for your house. Switching means changing the venting and gas or electric supply to match what the new unit needs, which is why this is a job for a contractor to size, not a straight swap of one box for another.
- What changes when you install a tankless water heater?
- The venting changes first. A tankless unit vents differently than a tank, so the pipe running to the outside of the house usually has to be replaced to match it. The gas line or electrical circuit feeding it may also need to be upsized. A tankless unit draws more at the moment it is heating water than a tank does. None of this is guesswork a homeowner should do. A contractor looks at the existing setup and tells you what has to change to fit the new unit.