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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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.
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 maxi-
mum horizontal run of 20 feet.
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)
(meters)
TABLE E
(meters)
11
H
+ H
1
= 20 feet (6.096 m) Max.
V
+ V +
H
+ H = 40 ft. (12.192 m) Max.
H
+ H
1
Maximum
+ V
1
V*
H
H
1
V
1
**Ceiling
Firestop/Spacer
(SV4.5VF)
**When using Secure Flex, use
Firestop/Spacer SF4.5VF
**Ceiling
Firestop/Spacer
(SV4.5VF)
Support Bracket
*To Top Surface
Of Fireplace
***Wall
Firestop/Spacer
***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.
HORIZONTAL VENT FIGURES/TABLES (CONTINUED)
Figure 33
-
Top Vent - THREE 90 DEGREE ELBOWS - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
Figure 32
-
Top Vent - TWO 90 DEGREE ELBOWS - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
See
Table 3 on page 18
as an aid in venting component selection for a particular range of exterior wall thicknesses.
See
Table 3 on page 18
as an aid in venting component selection for a particular range
of exterior wall thicknesses.
H
+ H
1
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
+ H
1
= 40 feet (12.2 m) Max.
H
+ H
1
= 20 ft. (6.096 m) Max.
TABLE D
(meters)
(meters)
Square termination (SV4.5HT-2) shown.
Square termination (SV4.5HT-2) shown.
V*
H
H
1
***Ceiling
Firestop/Spacer
(SV4.5VF)
***Note - When using
Secure Flex, use
Firestop/Spacer SF4.5VF
Support Bracket
*
To Top Surface Of
Fireplace
**Wall
Firestop/Spacer
**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.