Elements of A Successful Operation of Hydronic Heating Systems

Successful operation of a hydronic heating system depends on proper tube spacing and layout. Because the hot water gives off heat as it travels through the slab, manufacturers usually recommend laying the tubes in a spiral or serpentine pattern to help distribute the heat evenly. Tube spacing depends on several factors including the snow melting rate desired, the amount of insulation used under the slab, and the anticipated rate of heat loss. A typical spacing for an exterior slab on grade is 6 inches on center, which conveniently corresponds with the 6-inch grid pattern of welded wire reinforcing. But closer spacings may be needed in some applications.

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