desa international unvented (vent-free) propane gas log heater

INSTALLINGContinuedMinimum Non Combustible Material ClearancesIf Using MantelYou must have non combustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inchthick. With sheet metal, you must have non combustible material behind it. Noncombustible material must extend at least 8 inches up (for all models). If noncombustible material is less than 12", you must install the fireplace hood accessory(24" and 30" models only). Even if non combustible material is more than 12", youmay need the hood accessory to deflect heat away from your mantel shelf. Seechart below and Figures 6 and 7 for minimum clearances.IMPORTANT: If you cannot meet these minimum clearances, you must operateheater with chimney flue damper open. Go to Installing Damper Clamp Accessoryfor Vented Operation, page 13.Non Combustible Requirements forMaterial Distance (A) Safe Installation12" or more Non combustible material OK.Between 8" and 12" 24" or 30" Models: Install fireplace hoodacessory (GA6050 or GA6052, seeAccessories, page 33).18" Model: Non combustible material OK.Less than 8"Non combustible material must beextended to at least 8". See Between 8"and 12", above. If you cannot extendmaterial, you must operate heater withflue damper open.Mantel ClearancesIf you meet minimum clearance between mantel shelf and top of fireplace opening,a hood is not required (see Figure 6).Mantel Shelf10"8"6"2 1 /2"Underside ofMantel ShelfAll minimumdistances arein inchesMinimum Non-CombustibleMaterial(A)12"20"24 1 /2"27 1 /2"30"Log Set24"/30" Models8"14"16 3 /4"18 1 /2"20"18" ModelMinimum Non-CombustibleMaterial HeightDistances toUnderside ofMantelTop of FireplaceOpening101309Figure 6 - Minimum Mantel Clearances Without Using HoodIf above minimum clearances are not met, you must have a hood. Followminimum clearances shown in Figure 7 when using hood. Continued11