I would like to hook up a tankless water heater to my baseboard heater to heat the house and provide hot water. Can this be done?

Asked by chris
Croydon, PA

I have a very small house. I heat my home with baseboard oil heat.


Polly Osborne, FAIA, LEED AP

Answered by Polly Osborne, FAIA, LEED AP

Los Angeles, CA

Polly Osborne Architects

October 15, 2010

I don't recommend this, because tankless water heaters have a tendency to get buildup and to clog when put on a circulation pump.

  • They definitely do not like hot water returning to them.
  • There are some brands, newer ones, that claim to have solved this problem, and the hybrid types, like "Eternal," tend to perform better as well. 

"Phoenix" is a highly efficient tank-type water heater that is designed to do what you are asking.  

(See the related Q&A below which addresses the Phoenix heater below.)


For more information:

Read Florian Speier's Q&A "Can I configure an electric tankless water heater to run a baseboard hot-water heating system?"

Also, read Bill Bradbury's Q&A "What materials will I need for a hydronic baseboard heating system?"

Harris Woodward addresses the Phoenix tank heater in his Q&A "Is it worth it to pay for a Phoenix water heater or buy a condensing tankless water heater?"

Tagged In: tankless, heating cooling, winter energy

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