Water Heater Installation in Crystal Lake, IL
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What a Crystal Lake winter asks of a water heater
Winter nights here average 17°F from December through February, and homes need heat from October through May, eight months of the year. A water heater serving this area is working through most of the year, not just a few cold weeks.
Power matters here too. Across Illinois, 16% of households lost power for 24 hours or more in 2024, and this area has seen 18 winter storms and 140 damaging wind events over the past ten years. A gas water heater with a standing pilot keeps working through an outage. One with electronic ignition does not, and neither does an electric unit. Sizing matters as well. Federal minimum efficiency for storage water heaters is not one number, it is a formula based on the tank's rated volume, so the right minimum depends on the size of the tank going in.
- 17°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?
- Age is the first thing to check. Most tank water heaters have a working life of about a decade, so if yours is up there in years, a repair now may just delay a replacement you'll need soon anyway. Rust-colored water, a tank that's damp or wet around the base, or water that never gets as hot as it used to are all signs the tank itself is failing, not just a part inside it. If a contractor tells you the tank is leaking, that's not something to patch. A leaking tank gets replaced, not repaired.
- 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 a tankful, so you don't run out of hot water partway through back-to-back showers. It also tends to last longer than a storage tank. What it will not do is fix a small pipe or gas line that can't handle the unit's demand, and that's something a contractor has to check at your house before you decide. If your priority is simply replacing a failing tank, a new storage water heater does that job too.
- What changes when you install a tankless water heater?
- The unit itself is smaller and mounts on a wall instead of taking up floor space, which matters if you're tight on room. Gas-fired tankless units need a larger gas line than most storage tanks use, because they heat water on demand rather than keeping a tank warm, and that can mean upgrading the line to the unit. Venting is different too. A tankless water heater vents through pipe sized and routed for it, not through whatever venting served the old tank. All of this is specific to the house, so a contractor needs to look at your gas line, venting, and where the unit would go before pricing the job.


