One power unit is required for each set of HeatTrak Residential Snow-Melting walkway or stair Mats.
The HeatTrak HR-P GFCI Power unit is rain proof with a patented watertight connector on one end and a 3-prong grounded plug on the other end. In between the connectors is the GFCI safety device with Test and Reset buttons and an LED indicator light. The 6 foot cord is long enough for most homes and connects to the first or last mat in your set.
The HR-P is not required and not compatible with Commercial Industrial products; it only needs to be ordered with Residential products.