Gazco Studio 1 Glass Conventional Flue - Cool Wall KitScrew mounted to the front flange of the outer firebox, the 60mm deep U shaped attachments of the Cool Wall kit are designed primarily for studwork false chimney breasts. The additional depth allows some of the heat to be vented up into the void above the firebox and then re enter the room at a higher level. The effect is to produce a cooler wall immediately above the appliance than would otherwise be the case. The Cool Wall Kit is left unfinished so