Water Heater Installation in St. Joseph, MO
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St. Joseph water heaters work through a long, cold winter
Winter nights here average 21°F from December through February. Incoming water runs cold for months at a time, and the tank has to bring it up to temperature on every draw, whether that is a shower or the dishwasher running.
Buchanan County has seen 8 winter storms and 72 damaging wind events over the past ten years, and in Missouri, 19% of households went at least 24 hours without power in 2024. A new installation is worth planning around that. Federal efficiency minimums for storage water heaters are not one number. They are set by a formula tied to the tank's rated volume, applied separately across four draw patterns, so a small tank and a large tank do not face the same minimum.
- 21°F
- the average winter night, and colder incoming water means longer heating
- 7 months
- October through April, the months homes here need heat
- 19%
- of Missouri 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 $270 a year to run in Missouri compared with an electric water heater.
Estimates for a typical Missouri home, from EIA household energy data and Missouri 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 span, and once yours is old enough, a leak can start any day. Look at the tank itself for rust or moisture at the base, since that means the tank is failing from the inside and won't be fixed. If your water is taking longer to heat, running out faster than it used to, or the pilot won't stay lit, the heater is telling you it's near the end. With winter nights here dropping to 21°F, a failing water heater tends to show its worst side right when you need hot water most.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on whether your current one is failing. A tankless unit heats water on demand instead of storing it, so you don't run out during a long shower or back to back loads of laundry, and it takes up far less space than a tank. It costs more to install than a like for like tank replacement, and a contractor can tell you whether your home's gas line and venting can support one. If your current tank still works fine, switching is a choice about how you want your hot water to behave, not a repair.
- What changes when you install a tankless water heater?
- The biggest change is that hot water never runs out, because the unit heats water as it flows through instead of pulling from a stored tank. Gas tankless units usually need a larger gas line and a dedicated vent than a tank water heater used, so the installation involves more than swapping one unit for another. You also lose the buffer a tank gives you. During a power outage a standing pilot tank keeps working, but most tankless units need electricity to run their ignition and controls. That's worth knowing here, since close to a fifth of Missouri households went at least a day without power in 2024.