111921-01DFor more information, visit www.desatech.comFor more information, visit www.desatech.com99WARNING: Do not recess vent termination intoany wall. This will cause a fire hazard.6. Noncombustible Exterior Wall: Position the horizontal ventcap in the center of the 8 1/2" round hole and attach to the exte-rior wall with four wood screws provided. Before attachingthe vent cap to exterior wall, run a bead of non-hardening mastic(pliable sealant) around the outside edges to make a seal be-tween it and the outside wall.Note: The four wood screwsprovided should be replaced with appropriate fasteners forstucco, brick, concrete, or other types of sidings.Combustible Exterior Wall: For vinyl siding, stucco, or woodexteriors, a siding standoff may be installed between the ventcap and exterior wall. The siding standoff prevents excessiveheat from damaging the siding materials. Siding material mustbe cut to accommodate standoff. Bolt the vent cap to the stand-off. Apply non-hardening mastic around outside edge of stand-off. Position the standoff/cap assembly in the center of the10 3 / 4" square hole and attach to exterior wall with woodscrews provided (see Figure 11). The siding standoff must sitflush against the exterior fascia material.7. Combustible Exterior Wall Only: Slide the wall firestop overthe vent pipe before connecting horizontal run to vent cap (seeFigure 12).8. Carefully move fireplace, with vent assembly attached, towardwall and insert vent pipe into horizontal termination. The pipeoverlap should be a minimum of 11/ 4". Fasten all vent pipeconnections (except vent cap) with screws provided.VENTING INSTALLATIONINSTRUCTIONSContinuedVENTING INSTALLATION INSTRUCTIONSInstallation Planning (Cont.)Figure 10 - Installing Horizontal Vent Cap (NoncombustibleExterior)Apply Mastic toAll Four SidesFigure 11 - Installing Siding Standoff (Combustible Exterior)Vent Cap(HorizontalTermination)Interior WallSurfaceWallFirestopHorizontalVent PipeFigure 12 - Connecting Vent Cap with Horizontal Vent PipeScrewCut Siding Awayto Fit StandoffWood ScrewScrewsStandoffVent CapApply Masticto All Four SidesWood ScrewVent Cap