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question with maybe no answer

jay blair
jay blair Member Posts: 1

I'm a wholesaler who gets involved with a lot of hydronic designs. I deal with quiet a few different contractors who prefer different installation methods. I was curious if anybody has done efficiency testing on different heating appliance options. like using a boiler and indirect water heater vs. boiler and plate heat exchanger. or using an on demand water heater vs. indirect and boiler. there are also modulating boilers with built in controls vs. 90% boilers with tekmar mixing controls. would the efficiency differences be enough to worry about? I know a lot of these are based on preferences. say all the different configurations were installed in identical houses. which would be the most efficient? I know this is a pretty involved question. The reason I'm asking is, about five or six times a year a contractor or owner/builder comes to me with a set of plans and asks which is the best system to install.



  • Dan Peel
    Dan Peel Member Posts: 431
    a contractor's opinion

    From my perspective, as a contractor you need to install systems you understand. Your efficiency question is loaded but have not defined the base. Different combinations of emitters, design loading, delivery temperatures, setup and even life styles will change fuel usage of any of the configurations cited. Some single items are givens - outdoor reset saves energy, insulation saves energy. Beyond that the fuel of choice, building style and heat delivery systems need to be determined before selecting piping styles or boilers. Enjoy....Dan

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