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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
19
Figure 30
-
Top Vent - ONE 90 DEGREE ELBOW - ELBOW
CONNECTION NOT DIRECTLY AT APPLIANCE
See
Table 3
as an aid in venting component selection
for a particular range of exterior wall thicknesses.
Square termination (SV4.5HT-2) shown.
Example: If 20 feet of (H)
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) horizontal run,
up to a maximum horizontal
run of 20 feet.
H Maximum
V Minimum
feet feet
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 = 40 feet (12.2 m) Max.
H = 20 ft. (6.096 m) Max.
TABLE C
(meters)
(meters)
H
V
*When using Secure Flex, use
Firestop/Spacer SF4.5VF
*Ceiling
Firestop/Spacer
(SV4.5VF)
Support
Bracket
**Wall
Firestop/Spacer
**Use Firestop/Spacer SV4.5HF or SF4.5HF when using
Secure Vent or Secure Flex respectively. Use
Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using
Secure Vent or Secure Flex on horizontal vent runs for
the MPLDV35/40/45 with a center line lower than 48”
(1219 mm) above the fireplace top wrapper surface.
In all cases the firestop/spacer provided with the
termination may be used with the termination, frame
to 5” clearance where applicable.
Figure 31
-
Top Vent - ONE 90 DEGREE ELBOW -
CONNECTION DIRECTLY AT APPLIANCE
H = 28 inches (711 mm) Maximum
Square termination (SV4.5HT-2) shown.
H
Support
Bracket
*Wall
Firestop/Spacer
*Use Firestop/Spacer SV4.5HF or SF4.5HF
when using Secure Vent or Secure Flex
respectively. Use Firestop/Spacer SV4.5HF5
or SF4.5HF5 when using Secure Vent or
Secure Flex on horizontal vent runs for the
MPLDV35/40/45 with a center line lower than
48” (1219 mm) above the fireplace top
wrapper surface. In all cases the
firestop/spacer provided with the termination
may be used with the termination, frame to
5” clearance where applicable.