Water Heater Installation in Greensboro, NC
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What a Guilford County winter asks of your water heater
Your water heater has to work through seven months of cold incoming water here, October through April, with winter nights averaging 31°F. The colder that water is, the more the tank has to heat before it reaches your tap.
Power is part of the picture too. Guilford County has logged 12 winter storms and 166 damaging wind events over the past ten years, and a quarter of North Carolina households lost power for 24 hours or more at some point in 2024. A gas water heater with a standing pilot keeps running through an outage. An electric one shuts down and picks back up once power returns. Whichever type you install, the federal minimum efficiency it has to meet is set by its tank size, so the number that applies to your unit depends on how many gallons it holds.
- 31°F
- the average winter night, and colder incoming water means longer heating
- 7 months
- October through April, the months homes here need heat
- 25%
- of North Carolina 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 $300 a year to run in North Carolina compared with an electric water heater.
Estimates for a typical North Carolina home, from EIA household energy data and North Carolina 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 tank water heaters wear out after a decade or so of daily use, and once a unit is old, a repair is a bet against a tank that's already worn thin. Rust-colored water, a tank that's damp or wet at the base, or a pilot light that won't stay lit are all signs the unit is failing rather than just acting up. If a contractor has been out for the same problem more than once, replacement is usually the better move.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on your current heater being bad. A tankless unit heats water as it flows through instead of storing it, so you get hot water on demand and never run out partway through a long shower. It also takes up much less space than a tank. The tradeoff is that a tankless unit usually asks more of your home's gas line or electrical circuit, so a contractor needs to check what your house can support before you decide.
- What changes when you install a tankless water heater?
- The biggest change is what feeds it. A tankless unit needs a larger gas line or a dedicated electrical circuit than a tank ever did, since it has to heat water fast rather than keep a big volume warm and waiting. It also needs venting built for its exhaust, which is different from a tank's venting. None of this is a reason to avoid one, but it's why installation involves more than swapping one unit for another, and a contractor will need to look at the gas line, electrical panel, and venting before pricing the job.