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nibs · 05-09-16, 10:58 PM

Thanks AC, had not thought of the heat transfer. Sand was suggested by a fellow from Alberta, where it gets really cold, his opinion was that the sand allowed some movement in the Pex as it heated and cooled, he had done a few churches that way. Seemed like a good idea & with 4" of foam under, I suspect the heat transfer losses would not be significant.

05-09-16, 10:58 PM	#4
nibs Apprentice EcoRenovator Join Date: Jun 2010 Posts: 206 Thanks: 1 Thanked 18 Times in 17 Posts	Thanks AC, had not thought of the heat transfer. Sand was suggested by a fellow from Alberta, where it gets really cold, his opinion was that the sand allowed some movement in the Pex as it heated and cooled, he had done a few churches that way. Seemed like a good idea & with 4" of foam under, I suspect the heat transfer losses would not be significant.