21W415-0748 / 12.12.083.3 USING RIGID VENT COMPONENTSThe vent system must be supported approximately every 3 feet for both vertical and horizontal runs. Use WolfSteel vent spacers W615-0033 every 3 feet and on either side of each elbow to maintain the minimum 1 1/4”clearance between the outer rigid vent pipes and inner rigid vent pipes. Use Wolf Steel Ltd. support ringassembly or equivalent noncombustible strapping to maintain the minimum clearance to combustibles for bothvertical and horizontal runs.All inner exhaust and outer intake vent pipe joints may be sealed using either red high temperature siliconesealant W573-0002 (not supplied) or black high temperature sealant W573-0007 Mill Pac (not supplied) withthe exception of the fireplace exhaust flue collar which must be sealed using Mill Pac.25.13.3.1 HORIZONTAL AIR TERMINAL INSTALLATION3.3.2 EXTENDED HORIZONTAL AIR TERMINAL INSTALLATIONA. Follow the instructions for "HORIZONTAL AIR TERMINAL INSTALLATIONS" section.B. Continue adding components alternating inner rigid pipe and outer rigid pipe. Ensurethat all inner rigid pipe and elbows have sufficient vent spacers attached and eachcomponent is sealed and securely fastened to the one prior. Attach the inner telescopicsleeve to the vent run. Repeat using the outer telescopic sleeve. Seal and secure asbefore. To facilitate completion, attach inner and outer couplers to the air terminal.C. Install the air terminal. See “HORIZONTAL AIR TERMINAL INSTALLATION” section.TELESCOPICSLEEVEVENTINGAIR TERMINAL20"COUPLER55.1FIGURE 3.3.1FIGURE 3.3.2A. Move the fireplace into position. Measure the vent length required betweenterminal and fireplace taking into account the additional length neededfor the finished wall surface and any 1¼" overlaps between ventingcomponents.B. Apply high temperature sealant W573-0007 (not supplied) to the outeredge of the inner collar of the fireplace. Attach the first inner rigidpipe component and secure using 3 self tapping screws. Repeatusing the outer rigid pipe.C. Insert the vent pipes through the firestop maintaining the required clearance to combustibles. Holding theair terminal (lettering in an upright, readable position), secure to the exterior wall and make weather tightby sealing with caulking (not supplied).The air terminal mounting plate may be recessed into the exterior wall or siding no greater than thedepth of its return flange.SEALANTHI-TEMPOUTERPIPEINNERPIPECAULKING2" OVERLAPSCREWS#10 x 2½"26.2