A water heater heats cold water and delivers it to your faucets, showers, and appliances whenever you need it.
Key Takeaways
- A water heater heats cold water and sends it where you need it.
- Most Southeast Idaho homes use either a tank or a tankless water heater.
- Tank systems store and heat water. Tankless systems heat water on demand.
- A gas burner or electric heating elements do the heating.
- Knowing how yours works helps you spot problems early.
Need help with your water heater? Schedule service with RSJ Mechanical today.
What Is a Water Heater and What Does It Do?
A water heater is one of the most important appliances in your home. Still, most people never think about it until something goes wrong.
Its job is simple. It heats cold water and delivers it to your faucets, showers, and appliances whenever you need it.
Types of Water Heaters in Southeast Idaho Homes
Most homes in Southeast Idaho use one of two types: a tank water heater or a tankless water heater.
Tank Water Heaters
A traditional tank system stores and heats a large amount of water. That way, it’s ready to use throughout the day. You’ll usually find one in a garage, basement, or utility room.
Tankless Water Heaters
A tankless system doesn’t store water at all. Instead, it heats water instantly as it flows through the unit. This gives you continuous hot water and saves space.
Tankless units are sometimes called on-demand water heaters. Most are compact and mount right on a wall.
How Does a Water Heater Work?
Inside a Tank System
Inside a tank system, either a gas burner or electric heating elements warm the water to your set temperature. A heating element is a metal rod that gets hot when electricity runs through it. A thermostat on the tank controls the set temperature.
As you use hot water, it leaves through the hot water outlet. Cold water then enters the tank through the cold water inlet. The burner or elements heat it, and the cycle continues.
Inside a Tankless System
Tankless systems use powerful burners or elements to heat water on demand as it passes through. Because the unit only runs when you open a tap, it doesn’t spend energy keeping stored water hot.
Why Your Water Heater Matters
No matter which type you have, it plays a big role in comfort, safety, and energy use. The U.S. Department of Energy counts water heating among the biggest energy expenses in a typical home.
Understanding how it works helps you spot issues early and keep your home running smoothly.
How RSJ Mechanical Helps With Water Heaters
RSJ Mechanical helps homeowners choose the right water heater and keep their current system running safely. Our team can step in when you need a repair or replacement. Whether it’s a quick fix or a full upgrade, we make the process simple and stress-free.
RSJ Mechanical is a locally owned Idaho Falls HVAC company. We offer residential and commercial heating, cooling, and indoor air quality services. We also provide 24/7 emergency service and financing options.
Freaquently Asked Questions About Water Heaters
How long does a water heater last?
Most tank water heaters last about 8 to 12 years. Tankless units often last 20 years with proper care. Flushing your system once a year removes sediment and helps it last longer.
Can I switch from a tank to a tankless system?
In many homes, yes. The switch may require a larger gas line, new venting, or an electrical upgrade. A licensed technician should check your setup before you buy a new unit.
What temperature should I set my water heater to?
The U.S. Department of Energy recommends 120°F for most households. This setting saves energy and lowers the risk of scalding.
Ready for Reliable Hot Water?
Not sure your water heater is working the way it should? Contact RSJ Mechanical to schedule service or ask about financing on a new system. We’re here to help you understand your home.