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6' Max. Ceiling Support Pipe 12S-8DM Return Elbow 6' Max. 6' Max. Offset Elbow Offset Elbow Return Elbow 6' Max. 6' Max. Offset Elbow C A B Figure 9 - Typical Offset Installation Venting Installation Continued See Detail A Ceiling Support Pipe 12S-8DM 2" Min. See Detail B Straps Straps Straps Straps Detail A Return Elbow Detail B Angle Firestop Figure 10 - Ceiling Support Pipe 12S-8DM OFFSET RISE CHIMNEY LENGTH A B 48" 36" 24" 18" 12" 4 3/8" 16 3/8" ELBOW SET ONLY 9 3/4" 25 1/2" 1 12 3/4" 30 3/4" 1 15" 34 3/4" 1 18" 40" 1 1 21 1/4" 46 1/4" 1 23 3/4" 49 1/4" 1 1 27 3/4" 56 3/4" 1 30" 60 3/4" 1 1 33" 66" 1 1 36" 71" 1 1 38 1/4" 75" 2 41 1/4" 80 1/4" 1 1 1 45" 86 3/4" 2 46 3/4" 89 1/2" 1 1 1 51" 97" 1 1 53 1/4" 101" 2 1 56 1/4" 106 1/4" 2 59 1/4" 111 1/2" 1 1 1 61 3/4" 115 1/2" 2 1 64 3/4" 120 3/4" 2 1 68 1/4" 127" 1 2 70" 130" 2 1 1 74 1/4" 137 1/2" 1 2 1 76 3/4" 141 1/2" 1 2 1 79 3/4" 146 3/4" 4 Screws B A OFFSET CHART (22-50 FT. SYSTEM HEIGHT) Figure 11 - Elbow Offset Venting Installation Continued Firestop Spacers (V3600FS-8DM) Firestop spacers are required at each point where chimney penetrates a floor space. Their purpose is to establish and maintain required clearance between chimney and combustible materials. When pipe passes through a framed opening into a living space above, firestop must be placed onto ceiling from below as shown in Figure 12. They also provide complete separation from one floor space to another or attic space as required by most codes. When double wall pipe passes through a framed opening into an attic space, firestop must be placed into an attic floor as shown in Figure 13. Penetrating roof To maintain a 2" clearance to pipe on a roof with a pitch, a rectangular opening must be cut. 1. Determine center point where pipe will penetrate the roof. 2. Determine center point of the roof. Pitch is the distance the roof drops over a given span, usually 12". A 6/12 pitch means that the roof drops 6" for each 12" measure horizontally down from roof rafters. 3. Use roof opening chart (Figure 14) to determine correct opening length and flashing required. 4. Remove shingles around opening measured. Cut out this section. 5. Add next sections of pipe until end penetrates roof line. Check to see that proper clearances are maintained. Extend chimney by adding sections of double wall pipe until pipe is minimum of 30" above highest point of roof cutout. Termination and chimney must extend a minimum of 36" above highest point where it passes through roof. Flashing installation (v6f- 8dm or v12f-8dm) Determine flashing to be used with roof opening chart. Slide flashing over pipe until base is flat against roof. Replace as many shingles as needed to cover exposed area and flashing base. Secure in position by nailing through shingles (see Figure 15, page 11). DO NOT NAIL THROUGH FLASHING CONE. Installing Flashing on a Metal Roof When installing flashing on a metal roof, it is required that putty tape be used between flashing and roof. Flashing must be secured to roof using #8 x 3/4" screws and then sealed with roof coating to prevent leakage through screw holes. A roof coating must also be applied around perimeter of flashing to provide a proper seal. 14 3/8" (36.5 cm)30" (76.2 cm) 1" (2.5cm) 1" (2.5cm) Minimum Measurements1" (2.5 cm) Opening "A" If area above is a living space, install firestop below framed hole. Figure 12 - Firestop Spacer with Living Space Above Ceiling Pitch Slope Opening "A" Max. Used Flashing Model No. Flat 0° 15" V6F-8DM 0-6/12 26.6° 16 1/8" V6F-8DM 6/12- 12/12 45.0° 20 3/8" V12F-8DM If area above is an attic or insulated area, install firestop above framed hole. Figure 14 - Roof Opening Measurements Figure 13 - Firestop Spacer with Attic Space Above Ceiling Storm Collar Installation (SC1 or SC2) Place storm collar over pipe and slide down until it is snug against open edge of flashing (see Figure 16). Use SC1 for all round terminations and SC2 for all terminations with slip sections. Apply waterproof caulk around perimeter of collar to provide a proper seal. Terminations/Spark Arrestor Fireplace system must be terminated with listed round top or chase terminations. In any case, refer to installation instructions supplied with termination. Terminations approved for this fireplace are RT-8DM and RTL-8DM that can be used for flashing or chase and ET- 8DM, ETO-8DM, ETL-8DM and ETLO-8DM for chase style termination only. Figure 17 shows an RTL-8DM round top termination. CAUTION: Do not seal openings on the rooftop flashing. Follow the installation instructions provided with the termination being used. Terminations with 16" slip pipe sections are available. RTT-8DM and RTTL-8DM are approved for flashing installations. When needed, these adjustable terminations may be used in combination with pipe assembly to achieve correct chimney height. Note: In the rare instance there is a problem with side driven rain or wind or chimney is not drafting properly, an ADS-8DM (Anti-Draft Shield) can ...

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