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Hybrid Hot Water Heaters

I'm finally going to pull the trigger on a new water heating system and I was convinced a tankless with storage tank design was the way to go. I've read multiple message boards talking about this design and one really nice Fine Homebuilding article from 11/2007 describing the design in detail. I actually emailed my plumber that article:


However, this morning my plumber shows up with a brochure about a hybrid water heater. It's similar to what the above article describes except this company has put all the best features of tank + tankless into one unit. Here's the website:


Anyone have any experience with this unit or one like it? Or is it so cutting edge that none of us know what the long term results will be like?


  • How about


    Perhaps you would be interested in the unit above with it's small buffer tank and internal circulation solving what is mentioned in the article.
  • Youngdogs2
    Youngdogs2 Member Posts: 14

    I have installed some of the Eternal units and love them! Stainless Steel heat exchangers, no sandwich effect and a 20 year warranty. What's not to love! Eternal is also introducing wall hung product at the ASHRAE show in Orlando for their plumbing group.
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