Water Heater Installation in Gaithersburg, MD
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What a Gaithersburg winter asks of a water heater
Winter nights here average 27°F from December through February, and the incoming water your heater has to warm is just as cold. A tank working from a colder start point runs longer to hit the same setting on your tap.
Montgomery County has seen 23 winter storms and 443 damaging wind events over the past ten years, and across Maryland 11% of households lost power for at least 24 hours in 2024. A gas water heater with a standing pilot keeps working through an outage. One that relies on electronic ignition will not light until the power is back. New installations also have to meet the federal minimum efficiency for storage water heaters, which is set by a formula tied to the tank's rated volume rather than one number for every size.
- 27°F
- the average winter night, and colder incoming water means longer heating
- 7 months
- October through April, the months homes here need heat
- 11%
- of Maryland 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 $420 a year to run in Maryland compared with an electric water heater.
Estimates for a typical Maryland home, from EIA household energy data and Maryland fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- The clearest sign is water that used to run hot and now doesn't, or takes longer to heat than it did a year ago. Rust colored water from the hot tap, a tank that's rusting on the outside, or water pooling around the base are signs the tank itself is failing, not just a part inside it. A popping or rumbling sound during heating means sediment has built up on the bottom of the tank, and once that starts, the tank is working harder and wearing faster. Most storage tanks last a decade or so, so if yours is getting close to that age and showing any of these signs, it's worth having someone look at it before it fails outright and leaves you without hot water.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on any rule that says tankless beats a tank. A tankless unit heats water as it flows through rather than storing it, so you don't run out of hot water during a long shower or back to back loads of laundry the way you can with a tank. It also takes up much less space, which matters if your water heater is in a closet or a tight utility area. What it doesn't change is how fast hot water reaches your fixtures, since that's about the distance the water travels through your pipes, not how it was heated. A contractor can look at your gas line, venting and water use and tell you whether tankless makes sense for your house specifically.
- What changes when you install a tankless water heater?
- The biggest change is what's on the wall where your tank used to be. Tankless units are wall mounted and much smaller than a storage tank, so the space where the old tank sat opens up. Because they heat water on demand instead of keeping a tank hot around the clock, they need a gas line sized for a higher flow rate than most tank setups use, and often a different venting arrangement to handle the exhaust. Montgomery County requires a permit and inspection for a water heater installation, and switching from tank to tankless is the kind of change that inspection is meant to catch, since the gas and venting requirements are different from what was there before. A contractor who's done the switch before will know what your specific unit and house need.