Water Heater Installation in Decatur, IL
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Decatur winters put real demand on a water heater
Your water heater works through seven months of heating season here, October through April, with December through February nights averaging 22°F. Cold incoming water takes more energy to bring up to temperature, so a tank earns its keep most of the year in this county.
Power matters too. Illinois households saw outages of 24 hours or longer at a 16% rate in 2024, and the region has logged winter storms and damaging wind events over the past ten years. A gas water heater with a standing pilot keeps making hot water through an outage. One with electronic ignition will not light until power is back.
New units also have to meet the federal efficiency minimum, which is not one number. It is set by a formula tied to the tank's rated volume, applied separately across four draw patterns, so the minimum for one size tank is not the minimum for another. Whoever installs yours should size it to your household and match it to that number.
- 22°F
- the average winter night, and colder incoming water means longer heating
- 7 months
- October through April, the months homes here need heat
- 16%
- of Illinois 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 $360 a year to run in Illinois compared with an electric water heater.
Estimates for a typical Illinois home, from EIA household energy data and Illinois 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, since an older tank is more likely to fail than be worth repairing. Water around the base of the tank usually means the tank itself is leaking, not a part inside it, and that's not something a contractor can patch. Rusty or metallic-smelling hot water, water that doesn't get as hot as it used to, or popping and rumbling sounds from sediment buildup are all signs the tank is wearing out. If your unit is older and showing any of these, have a contractor look at it before it fails on its own and leaves you without hot water.
- Should I switch to a tankless water heater?
- It depends on what you want out of your hot water, not on whether your current tank has failed. A tankless unit heats water on demand, so you don't run out partway through back to back showers or a full sink of dishes. It also takes up much less space than a tank sitting in a closet or utility room. What it won't do is fix low water pressure or hard water, since those issues sit upstream of the heater itself. A contractor can walk through what your home's gas line, venting, and water quality would need to support one.
- What changes when you install a tankless water heater?
- The biggest change is usually the gas line and venting, since tankless units often need larger gas piping than a tank did to keep up when it fires. Electrical changes are common too, depending on the model and where it goes. You also lose the storage tank, so hot water only comes when something is drawing it, not from a reserve sitting ready. If your home has hard water, a tankless unit needs regular descaling to keep the heat exchanger clear, more upkeep than most tank units ask for. A contractor can tell you what your specific setup would need to make the switch.