Connecting Radiant Floor Heat To Oil Fired Boiler

Old 11-26-06, 12:15 AM
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Cool Connecting Radiant Floor Heat To Oil Fired Boiler

I Have A Oil Fired Boiler With A Base Board Hot Water System Running Off It I Teed Off The Feed And Return I Put A Addition On The House And Installed Radiant Heat In The Garage I Want To Connect To The Boiler But I Know I Need To Use A Mixing Valve And Run A Small Loop Fro The Feed Add A Circulator And Return It To The Boiler Then Off That Loop Tee It To The Radiant Floor This Is Where I Get Lost I Know I Need About 100 Degree Water I Have 160 Going To My Base Board I Need Some Kind Of Diagram To See It I Want To Use A 4 Way Mixing Valve A Control To Read Out Side Temp And Inside Temp Floor Temp I Do Have Circulators 1 For The Small Loop And 1 For The Radiant Floor Can Any Body Please Help Thank You For Your Time
Old 11-26-06, 05:01 AM
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Go to and search for the Radiant Made Easy Application Guide. Comes in a bunch of chapters as PDFs.

Also see their I-SeriesR mixing valve with built-in outdoor reset. Might be just what you need.

You could also check out in the Literature section, some of the technical essays talk about mixing methods and have good diagrams.
Old 11-27-06, 12:29 AM
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Radiant Diagrams

Hydronics engineer John Siegenthaler has written numerous articles containing diagrams of radiant circuits for Plumbers & Mechanics Magazine (; he always includes a diagram with his articles.

You would have to go thru a registration process before given access, or you could Google the following titles to access the diagrams:
"Dashed Expectations", "A little floor warming Please", "Less is More", "The do's & don'ts of 3-way thermostatic valves", "Beyond Closely spaced tees", "a signature system".

Once you click onto any of these articles, it will include numerous additional articles you can click onto to get the info you need.

Siegenthaler also has a well-known book carried by most public libraries (read free of charge), "Modern Hydronic Heating" that is an easy read & contains numerous easy to read radiant & hydronic circuit diagrams; there is also a reference section that explains the meaning of each of the diagram symbols he uses.

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