Mr PEX’s DuoTrack is new style of extruded aluminum heat transfer plate for 3/8” and 1/2” PEX tubing in the same plate. It is 48” long by 3 3/4” wide with prepunched holes featuring a double grove for two sizes of PEX tubing. This reduces inventory, space and cost. The plates are low mass and have a faster response time, higher output and a lower water temperature requirement as compared to joist heating without plates.