Water Heater Installation in Keene, NH
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What a Keene winter asks of a water heater
Groundwater coming into your house is cold most of the year, and from December through February it's working against nights that average 15°F. Your water heater is heating right alongside your furnace for 9 months, September through May. That's most of the year spent making up ground your incoming water lost to the cold.
Power is the other piece. Across New Hampshire, 22% of households lost power for 24 hours or more in 2024, and Cheshire County has seen 34 winter storms and 164 damaging wind events over the past ten years. A storage tank holds its heat through a short outage. A tankless unit needs power to fire at all, worth knowing if you're choosing between them. Whatever you install, the federal minimum efficiency isn't one number. It's set by a formula tied to the tank's rated volume, and it's applied differently across four draw patterns, so the minimum for your household depends on the size you actually need.
- 15°F
- the average winter night, and colder incoming water means longer heating
- 9 months
- September through May, the months homes here need heat
- 22%
- of New Hampshire 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
- How do I know it's time to replace my water heater?
- Age is the first thing to check, and a contractor can tell you where your unit stands against its expected life. Rust colored water, a tank rusting on the outside, or water pooling underneath are signs the tank itself is failing, and that can't be repaired. If it's still running fine but getting old, replacing it on your schedule beats replacing it after it floods a closet.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on whether your current tank is old. A tankless unit heats water as you use it instead of storing it, so you get endless hot water instead of running out partway through back to back showers. It also takes up a lot less space than a tank. Against that, a tankless unit costs more upfront and needs a contractor to check that your gas line and venting can support it, since those requirements are different from a tank setup.
- What changes when you install a tankless water heater?
- The unit mounts on a wall instead of standing on the floor, so you get that floor space back. It also needs its own venting, sized for a tankless unit rather than reused from the old tank, and in many homes it needs a larger gas line to deliver enough fuel to heat water on demand. A contractor has to check your home's gas supply and venting before installation to confirm what needs to change, since that depends on the specific house.