www.desatech.com108795-01N 7PRE-INSTALLATIONPREPARATIONCLEARANCESMinimum clearances to combustibles are:• Back and Sides of Outer Surround . . . 0" min.• Drywall to Sides of Front Face(Nailing Flanges) . . . . . . . . . . . . . . 0" min.• “B” Vent Surfaces . . . . . . . . . . . . . . . . 1" min.• Ceiling to Opening . . . . . . . . . . . . . . 42" min.• Floor . . . . . . . . . . . . . . . . . . . . . . . . . . 0" min.• Perpendicular Wall . . . . . . . . . . .See Figure 6CAUTION: Do not blockrequired air spaces with insu-lation or any other material. Donot obstruct effective openingof appliance with any type offacing material.Figure 3 - Minimum Clearances(Top View)0"0" ClearanceNailingFlangeFront FaceLeft SideSurroundBackDrywall2 x 4 StudFigure 4 - Minimum Clearances(Front View)* ***42" (1067mm)Min. Clearancefrom Opening toCeiling 0" ClearanceCeiling1" (25mm) Min.Clearance to"B" Vent's Outer PipeMaintain 2" (51mm) Min.Clearance to the TransitionPipe as Measured at theOuter Vent CollarRequired AirSpaces areIndicated withan "*". Do NotPack withInsulation or AnyOther MaterialDO NOT BLOCKOR OBSTRUCTOPENINGS0" Clearance toCombustible orNoncombustibleFlooringMANTEL CLEARANCES AND WALLDETAILSA combustible mantle shelf maybe installed amaximum 12" (229 mm) from the wall. Figures5 and 6 show the minimum allowable distancesfrom various combustible mantle componentsin relation to the fireplace opening.Spacer3" (76mm)1 1 /2 "(38mm) Max.B6" (152mm)A12"(229mm)CombustibleMaterialsHeaderFigure 5 - Mantel Clearances - Side View(Cross Section)M36(B,H),M36P(B,H)VM36(B,H),VM36P(B,H)M42(B,H),M42P(B,H)VM42(B,H),VM42P(B,H)A 14" (356 mm) 15" (381 mm)B 8" (203 mm) 9" (229 mm)1 1 /2 " (38 mm)Max. 3" (76 mm)Max.6" (152 mm)Max.ABOuter SurroundCombustibleMaterial MayBe UsedTOP VIEWSAFEZONEPerpendicularWallFigure 6 - Side Clearances - Top View(Cross Section)M36(B,H),M36P(B,H)VM36(B,H),VM36P(B,H)M42(B,H),M42P(B,H)VM42(B,H),VM42P(B,H)A 9" (229 mm) 6" (152 mm)B 12" (305 mm) 9" (229 mm)