Graysen Woods 40" x 40" Full Size Standard Wall Ceramic Hearth Pad h18.75 Height without standoff 35" Width h19.7 Height without standoff 35" Width 39" Depth 20" Ceramic Glass Width 32" Ceramic Glass Height 22" Framing Width 39" Framing Height 41" Framing Depth 20" The co axial vent system has the exhaust pipe within the air intake pipe which protects any surrounding combustible material from the high temperature of the flue gases as well as preheating the outside air prior to it being introduced to the combustion process Graysen Woods Hearth Pads come with a seven (7) year warranty against defects in material or workmanship to the original purchase All warranty claims will be handled by the original selling dealer and are limited to the repair or replacement of the Hearth Pad