Water Heater Installation in Waukegan, IL
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What a Waukegan water heater has to handle
Winter nights here average 19°F from December through February, and homes in this area need heat from October through May, eight months of the year. A water heater runs through that whole stretch without a break.
Power outages are part of the picture too. Lake County has seen 20 winter storms and 138 damaging wind events over the past ten years, and across Illinois, 16% of households lost power for 24 hours or more in 2024. A gas water heater with a standing pilot keeps making hot water through an outage like that. One with electronic ignition will not run without power, but it will come back on by itself once power returns.
When you replace a tank, the new one has to meet the federal minimum efficiency for its size and type. That minimum comes from a formula based on the tank's rated volume, so the number is not the same for every heater. A licensed installer will size the replacement to your household and match it to what the law requires for that size.
- 19°F
- the average winter night, and colder incoming water means longer heating
- 8 months
- October through May, 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?
- The clearest sign is age. Most storage water heaters wear out after long enough service that a repair just delays the next breakdown, so if yours is old and acting up, replacement is worth considering over another fix. Watch for rusty water, a tank that's damp or rusted around the base, or water that doesn't get as hot as it used to. Popping or rumbling sounds mean sediment has built up inside the tank, and that shortens what's left of its life. If you're seeing any of these signs, replacing it before it fails outright saves you from a cold shower or a flooded utility closet.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on any rule that says tankless is better. A tankless unit heats water only when you run a tap, so you won't run out of hot water during a long shower or back to back loads of laundry. It also takes up far less space than a tank. What it won't do is deliver hot water instantly at every fixture. There's still a short wait while the water sitting in the pipe between the heater and the tap warms up, same as with a tank. A contractor can look at your home's layout and your household's hot water use and tell you whether the switch makes sense.
- What changes when you install a tankless water heater?
- The biggest change is what's on your wall instead of what's on your floor. A tankless unit mounts to a wall and takes up a fraction of the space a storage tank does. Gas models need enough gas line capacity to fire the burner on demand, which sometimes means upsizing the line, and they need proper venting since they run hotter and more often than a standing pilot tank. Electric tankless units draw a lot of power in a short burst, so the home's electrical panel has to be able to handle it. A contractor will check your gas line, venting, or electrical setup against the specific unit before installing it.


