363.2.3.5 WALL VENT INSTALLATIONInstall the ventilation system in accordance with the manufacturer's instructions included with the components.(see 3.2.3).Install the unit in the desired location. Check to determine if studs, structural walls or rafters could pose aproblem when fastening the vent system.The flexible horizontal vent lengths must be supported every 3 ft. (90 cm). Wall ties are provided for thispurpose. The vent support can be used to fasten both hard and flexible vents.A firestop is included with the fireplace; it is adapted to receive both the vent and the insulating sleeve that coversthe first 8 ft. of vent.If the first 8 ft. of vent must go through a wall, cut out a 11.75 x 11.75 in. (30 x 30 cm) square hole or a Ø11.75in. hole and use the firestop provided with the fireplace.Cut and frame the interior wall where the exhaust vent will go. If the wall the vent goes through is made of anon-combustible material, a Ø 9½ in. (Ø 24.2 cm) hole is sufficient for a flexible duct; the firestop will not berequired.The horizontal length of the vent must be level or have a ¼ in. per foot upward slope.CAUTION: Never allow the vent to go downwards. This could lead to improper exhaust venting and cause a fire.A firewall is required at each floor level and wherever the ventgoes through a wall.Slide the vent toward the wall and carefully insert the pipeinto the vent cap. It is important that the vent pipe overlaps thevent cap on a minimum of 1 ½ in. (3.8 cm). Fasten both partstogether using three self-drilling screws.Figure 3.2.3.5.aFigure 3.2.3.5b
