Monessen Gcuf42c-f 42-inch Louvered Circulating Vent-free Firebox With Cottage Clay Firebrick Clean and Easy Zero Clearance Design Enjoy Radiant Warmth and a Wide Viewing Area Efficient and Economical Vent Free Application Heat Circulating Air Ducts for Optional Blower Installation Cottage Clay Firebrick and Mesh Curtains for True Fireplace Appeal