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Old 08-07-2009, 06:59 PM   #1
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In Floor Radiant Heat


I am trying to replace my existing forced air heating system with an in floor heating system. I am planning on doing the work my self. I am wondering if there is a formula for finding out how much of the PEX tubing I am going to need. My house is close to 1000 sq. ft and I have an unattached cottage that is about 300 sq. ft. that I would like to plumb in as well. Can any one tell me what I need to do to get the correct amount of tubing?

Thanks in advance

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Old 08-10-2009, 07:52 AM   #2
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In Floor Radiant Heat


When I have worked on these, I took sketches to the pex supplier. He sent them to the manufacturer, who then layed out the system. I got sketches back with the placement of the loops, number of loops and lengths and the diameter of the tubing required. The sketch included the supply temperatures and the expected return temps for each loop and whether transfer plates were required.
Hope that helps.

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