Installation of a metal floor pad adds a level of protection to your floor, protecting it from the heat coming from your heaters as well as the weight of your heater. This metal floor pad is 36" x 14" and for use under Empire High Efficiency Direct Vent as well as some Vented Heaters. Models include the DV-20E, DV-40E, DV-55E High Efficiency Direct-Vent Wall Furnace and the RH-25, RH-35 Vented Room Heaters.