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H + H1 = 20 feet (6.096 meters) Max. Table G H + H1 Maximum V Minimum feet (meter) feet (meter) 3 (0.914) Elbow Only 5 (1.524) 1 (0.305) 10 (3.048) 2 (0.610) 15 (4.572) 3 (0.914) 20 (6.096) 4 (1.219) V + H + H1 = 40 feet (12.2 m) Max. H + H1 = 20 ft. (6.096 m) Max. vWall Firestop/ Spacer (SV4.5HF) u Ceiling Firestop / Spacer (SV4.5VF) u When using Secure Flex, use Firestop / Spacer SF4.5VF v When using Secure Flex, use Firestop / Spacer SF4.5HF Note: See Table 9 as an aid in venting component selection for a particular range of exterior wall thicknesses. u Ceiling Firestop / Spacer (SV4.5VF) v Wall Firestop/ Spacer (SV4.5HF) v Wall Firestop/ Spacer (SV4.5HF) u When using Secure Flex, use Firestop / Spacer SF4.5VF v When using Secure Flex, use Firestop / Spacer SF4.5HF Note: See Table 9 as an aid in venting component selection for a particular range of exterior wall thicknesses. Example: If 20 feet of (H + H1) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required. This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V) vertical, you are allowed 5 feet of (H+ H1) horizontal run, up to a maximum horizontal run of 20 feet. Example: If 20 feet of (H + H1) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required. This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V) vertical, you are allowed 5 feet of (H+ H1) horizontal run, up to a maximum horizontal run of 20 feet. An elbow is acceptable as 1 foot of vertical rise except where an elbow is the only vertical component in the system. See Figure 36. Figure 37 - Side Vent, TWO 90 DEGREE ELBOWS Figure 38 - Top Vent, TWO 90 DEGREE ELBOWS Square termination (SV4.5HT-2) shown HORIZONTAL Vent Figures / Tables (continued) Square termination (SV4.5HT-2) shown NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 23 V H2 H1 H V H H1 V1 v Wall Firestop / Spacer (SV4.5HF) u Ceiling Firestop / Spacer (SV4.5VF) u Ceiling Firestop / Spacer (SV4.5VF) u Wall Firestop / Spacer (SV4.5VF) v Wall Firestop / Spacer (SV4.5HF) u When using Secure Flex, use Firestop / Spacer SF4.5VF v When using Secure Flex, use Firestop / Spacer SF4.5HF Note: See Table 9 as an aid in venting component selection for a particular range of exterior wall thicknesses. v Wall Firestop / Spacer (SV4.5HF) u When using Secure Flex, use Firestop / Spacer SF4.5VF v When using Secure Flex, use Firestop / Spacer SF4.5HF Note: See Table 9 as an aid in venting component selection for a particular range of exterior wall thicknesses. Table H H + H1 + H2 Maximum H Maximum V Minimum feet (meter) feet (meter) feet (meter) 5 (1.524) 2 (0.610) 1 (0.305) 10 (3.048) 4 (1.219) 2 (0.610) 15 (4.572) 6 (1.829) 3 (0.914) 20 (6.096) 8 (2.438) 4 (1.219) V + H + H1 + H2 = 40 feet (12.2 m) Max H = 8 feet (2.438 meters) Max. H + H1+ H2 = 20 feet (6.096 meters) Max. Example: If 20 feet total (H+H1+H2) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required. This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V) vertical, you are allowed 5 feet of horizontal run up to a maximum total (H+H1+H2) horizontal run of 20 feet. Example: If 20 feet total (H+H1) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required. This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V) vertical, you are allowed 5 feet of (H+ H1) horizontal run, up to a maximum horizontal run of 20 feet. An elbow is acceptable as 1 foot of vertical rise except where an elbow is the only vertical component in the system. See Figure 36. Table J H + H1 Maximum V Minimum feet (meter) feet (meter) 5 (1.524) Elbow Only 5 (1.524) 1 (0.305) 10 (3.048) 2 (0.610) 15 (4.572) 3 (0.914) 20 (6.096) 4 (1.219) H + H1 = 20 feet (6.096 m) Max. V + V1+ H + H1 = 40 ft. (12.192 m) Max. Figure 40- Top Vent, THREE 90 DEGREE ELBOWS Figure 39 - Side Vent, THREE 90 DEGREE ELBOWS HORIZONTAL Vent Figures / Tables (continued) Square termination (SV4.5HT-2) shown Square termination (SV4.5HT-2) shown VERTICAL OR HORIZONTAL VENTING USING SECuRE FLEX KITS AND COMPONENTS VERTICAL OR HORIZONTAL VENTING USING SECuRE FLEX KITS AND COMPONENTS Using adapter (SV4.5RF), Secure Flex kits may be added to the end of a vent run made up of rigid Secure Vent (SV4.5) vent sections provided that doing so does not violate any of the venting length, height, routing, horizontal to vertical ratio requirements or clearance considerations detailed in this manual. Secure Flex kits come with an adapter that can be fitted to the inclined channel end of the last Secure Vent (SV4.5) vent section in a rigid system in the exact same fashion as any other Secure Vent section. Align the dimpled end of the adapter over the previously installed section or appliance collar, adjusting the radial alignment until the four locking dimples of the adapter are aligned with the inlets of the four incline channels of the last vent section or collar. Push on the adapter until it fully engages, then t...

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