Climate Panels are a plywood dry mass radiant panel system designed to be attached to the subfloor. Once attached the Climate Panel will accept 5/16 in ViegaPEX® Barrier tubing. The panels are constructed of CCX fir plywood with an aluminum heat transfer sheet underneath for even heat distribution and high performance output. U-Turn strips allow tubing to be turned around at each end of the room to connect with the next row of panels.