Combi System Animations

Comment

Comment by Gordon Stone on December 10, 2012 at 6:59am

How does this solution compare in energy use to a high efficiency furnace with on-demand water heater? 

Are these hydronic air handlers a slide-in replacement for existing furnaces?

Comment by Greg La Vardera on December 10, 2012 at 6:56am

So who offers such appliances here in the US. Last time I checked, nobody.

Comment by Lester Shen on December 10, 2012 at 6:45am

Thanks for the comment, Barbara.  The system you are referring to is a common type of combi system and a high efficiency boiler with a well-insulated side arm tank is a pretty straightforward high efficiency install for hydronically heated homes. Ben has been working on a project with Sustainable Resources Center, a local low-income provider, looking at the potential for combi systems as a mechanical system retrofit with forced air systems. While it may not be the first thing most people think of, a combination system with a high efficiency water heater and a hydronic air handler has been a good solution. Ben's project is characterizing the installed performance of over 300 DIA systems with monitoring in 20 Minnesota homes and documenting the subsequent energy savings. You can learn more about the project here.

Comment by Barbara Smith on December 6, 2012 at 1:33pm

I usually think of a combination system starting with a hydronic boiler using distribution through radiators, rather than an air handler.  Then with domestic hot water through a sidearm water heater, indirect water heater, or maybe a tankless water heater.  Maybe this varies in different parts of the country.

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