111115-01D8For more information, visit www.desatech.comFor more information, visit www.desatech.comMANTEL CLEARANCESIn addition to meeting noncombustible material clearances, youmust also meet required clearances between fireplace openings andmantel shelf on each side of the fireplace. If you do not meet theclearances listed below, you will need a hood.Determining Minimum Mantel ClearanceIf you meet minimum clearance between mantel shelf and top offireplace opening, a hood is not required (see Figure 6).Determining Minimum Mantel Clearance Whenusing a HoodIf minimum clearances in Figure 6 are not met, you must have ahood. When using a hood there are still certain minimum mantelclearances required. Follow minimum clearances shown in Figure7, page 9 when using hood.NOTICE: If your installation does not meet the mini-mum clearances shown, you must do one of thefollowing:• operate the logs only with the flue damper open• raise the mantel to an acceptable height• remove the mantelFigure 6 - Minimum Mantel Clearances Without Using HoodMinimum Non-CombustibleMaterialMinimum Non-CombustibleMaterial HeightDistances toUnderside ofMantelTop of FireplaceOpeningUnderside ofMantel ShelfMantel Shelf12"(A)18" 20" 22" 24"All minimumdistances arein inches2 1/2 "6"8"10"NOTICE: Surface temperatures of adjacent walls andmantels become hot during operation. Walls andmantels above the firebox may become hot to thetouch. If installed properly, these temperatures meetthe requirement of the national product standard.Follow all minimum clearances shown in this manual.INSTALLATIONContinuedMinimum Noncombustible Material ClearancesIf Not Using MantelNote: If using a mantel, proceed to If Using Mantel. If not using amantel, follow the information below.You must have noncombustible material(s) above both fireplaceopenings. Noncombustible materials (such as slate, marble, tile,etc.) must be at least 1/2 inch thick. With sheet metal, you must havenoncombustible material behind it. Noncombustible material mustextend at least 8" up (for all models). If noncombustible material isless than 12", you must install the fireplace hood accessory. SeeFigure 5 at right for minimum clearances.IMPORTANT: If you cannot meet these minimum clearances, youmust operate heater with chimney flue damper open. Go to Install-ing Damper Clamp Accessory for Vented Operation, page 9.If Using MantelYou must have noncombustible material(s) above the fireplaceopening. Noncombustible materials (such as slate, marble, tile, etc.)must be at least 1/2 inch thick. With sheet metal, you must havenoncombustible material behind it. Noncombustible material mustextend at least 8 inches up (for all models). If noncombustible materialis less than 12", you must install the fireplace hood accessory. Evenif noncombustible material is more than 12", you may need the hoodaccessory to deflect heat away from your mantel shelf. See Figure 5and 6 and Figure 7, page 9, for minimum clearances.Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.)Above FireplaceHeat ResistantMaterial(A)Noncombustible Requirements forMaterial Distance (A) Safe Installation12" or more Noncombustible material OK.Between 8" and 12" Install fireplace hood accessory(GA6050, GA6052 or GA6053, seeAccessories, page 27).Less than 8" Noncombustible material must beextended to at least 8". SeeBetween8" and 12", above. If you cannotextend material, you must operateheater with flue damper open.INSTALLATIONInstallation and Clearances (Cont.)Mantel Clearances