What is a Tankless Water Heater?

Tankless water heaters

Yes, you can get plenty of hot water from a water heater that doesn’t have a tank

It doesn’t seem possible. You want to take a long hot shower while you’re running your dishwasher and washing a load of clothes too. How can you possibly get all the hot water you need if it’s not already stored away in a storage tank?

The secret is propane! A propane tankless water heater uses a flame so hot you don’t need to keep your water heated in a tank. You just turn on a hot water faucet. A flow sensor will activate a propane gas burner to heat the water. The heating will continue until you turn off the faucet, at which point the gas burner shuts off.

Take a closer look at how a tankless water heater works:

How tankless worksHow it works

Leading water heater manufacturer Navien has provided this illustration of how a tankless water heater works.

Why a propane tankless water heater?

Compare your water heating options

Type of Water Heater EF (Energy Factor) Annual Operating Costs*
Propane Tank 0.58 $682
Propane Tankless 0.82 $482
Propane Condensing Tankless 0.96 $412

*For comparison purposes only; costs may vary depending on region and household; based on national averages as complied by the Dept. of Energy, U.S. Energy Information, 2013.

Two great options for propane tankless water heaters

Non-Condensing Tankless System

Condensing Tankless System

Tankless Water Heater Facts (PDF)


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EnergyUnited serves more than 124,000 electric customers in central and western North Carolina, making it the second largest supplier of residential electricity in North Carolina. EnergyUnited Propane provides propane service to residential, commercial and industrial customers in 63 North Carolina counties and 11 South Carolina counties. LOCATIONS >>
P.O. Box 1831
Statesville, NC 28687