FAQ: The Pros and Cons of Tankless Water Heaters

QUESTION: Should I replace my old water heater with one of those tankless heaters I've heard about?

 

ANSWER: The CWLP Energy Experts don't usually recommend a tankless system as a replacement for a centrally located traditional water heater. A gas unit, with its standing pilot light, probably will provide little or no savings over a well-insulated tank heater. An electric tankless system might be a little more efficient than a conventional water heater, but the savings most likely will be too small to offset the high purchase cost.

Tankless heaters are good for some specific point-of-use applications, such as when distance from a centralized tank heater makes it hard or inconvenient to get a sufficient supply of hot water to a kitchen or bathroom. In this case, you could install a tankless heater right in that room.

Otherwise, we recommend using a traditional tank heater and taking steps—like wrapping both the tank and the water pipes with insulation and installing heat traps on the pipes where they exit the top of the tank—to ensure it will operate as efficiently as possible.

If your old water heater is a gas unit, consider replacing it with a 30-gallon or larger electric model and you might qualify for CWLP's Water Heater Rebate. To be eligible for the rebate, you must be a CWLP residential electric customer and must be pre-certified to participate in the program.


 

Last updated: 01/12/10