The FloorPanel system from ComfortProdoes it all for dry above radiant floor heating applications. Its unique design easily secures 3/8-inch PEX tubing with 8-inch on center spacing in any direction - straight runs, turns or both. Tongue-and-groove edges allow for quick interlocking installation and maximum surface continuity. Pre-drilled countersunk mounting holes provide for ease of installation. Moisture resistant MDF construction provides protection against high levels of humidity and occasional wetting of installation area (basements, baths and kitchens). FLoorPanel comes in one size, 24 inches x 24 inches x 5/8 inch (overal dimension 4 square feet) that allows for straight forward material calculations and lower finished floor height.