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Old 03-18-13, 02:36 PM   #4
AC_Hacker
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Quote:
Originally Posted by cbearden View Post
I'll be installing it throughout in-between the joists of our floor framing...
The PEX in the concrete works because concrete is a pretty good conductor of heat. Heat transfers through conduction very efficiently.

PEX in concrete is a very efficient configuration.

If you are only running PEX through the spaces between the floors, you'll have what is known as "suspended tubing". This configuration ranks at the very bottom, in terms of efficiency.

If you physically fasten the PEX to your ceiling, you will then be approximating what is known as "Staple-up", which is only one notch up from suspended.

If you use aluminum spreader plates and make sure that they are in good physical contact with your sheet rock, you'll have a pretty high efficiency set-up.

-AC
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