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RE: Radiant heat/conc. floor

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Title: RE: Radiant heat/conc. floor

Radiant floor heating systems are similar in may ways to the systems used to cool floors for hockey rinks.  They should actually have fewer problems, since the range of temperatures they see is smaller. 

Two thoughts, based on some rink experience: 
First, have the pipes filled with water when placing the concrete/gypcrete.  This reduces the tendency of the pipes to float and provides a final leak check.

Second, consider using a covered and drained trench where the pipes intersect the supply and return manifolds.  If a leak ever develops, it will be at the pipe/manifold junction and being able to get to it without breaking concrete will be a big plus.  You can stuff batt insulation in the trench to muffle any "hollow" sound.