Lennox MPDP35IN Installation Instructions

23
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
TABLE F
H Maximum V Minimum
feet (meters) feet (meters)
3 (0.914) * (0.061)
7 (2.134) 3 (0.914)
11 (3.35) 4 (1.22)
14 (4.267) 5 (1.524)
18 (5.49) 6 (1.729)
20 (6.2) 7 (2.134)
V + H + H1 = 40 feet (12.2 m) Max.
H + H1 = 20 ft. (6.096 m) Max.
Figure 44: Top Vent - TWO 90-DEGREE ELBOWS
Example: If 20 feet of (H + H
1
) horizontal
vent run is needed, then 4 feet minimum of
(V) vertical vent will be required.
Typical termination shown.
V
H
H
1
Wall Firestop/Spacer
(SV4.5HF)
When using Secure Flex,
use Firestop/Spacer
SF4.5HF.
Ceiling
Firestop/Spacer
(SV4.5VF)
Note - When using
Secure Flex
®
, use
Firestop/Spacer SF4.5VF.
Wall
Firestop/Spacer
(SV4.5HF)
Min. One Foot Vent
Section Required
Note:
• An elbow is acceptable as 1 ft. of vertical rise.
• An elbow may NOT be attached directly to the vent collar.
• Install the U-shaped vent restrictor in any run with more than
8 ft. of vertical rise (see Pages 13 and 14).
• See Table 8 on Page 22 as an aid in venting component
selection for a particular range of exterior wall thicknesses.
* Minimum 1 ft. section and elbow
HORIZONTAL VENT FIGURES/TABLES (continued)
Figure 45: Rear Vent - TWO 90-DEGREE ELBOWS
Square termination (SV4.5HT-2) shown.
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.
See Table 8 on Page 22 as an aid in venting component
selection for a particular range of exterior wall thicknesses.
Note: Install the U-shaped vent restrictor in any run with more
than 8 ft. of vertical rise. See Pages 13 and 14.
H
1
V
H
Ceiling
Firestop/Spacer
SV4.5VF*
Wall Firestop/
Spacer
SV4.5HF**
*When using Secure Flex, use
Ceiling Firestop/Spacer SF4.5VF.
**When using Secure Flex, use
Wall Firestop/Spacer SF4.5HF.
TABLE H
H
+H
1
Maximum H Maximum
V Minimum
feet
feet
feet
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 + H
1
= 40 feet (12.2 m) Max.
H = 8 feet (2.438 meters) Max.
H + H
1
= 20 feet (6.096 meters) Max.
(meters)
(meters)
(meters)
TABLE G

Lennox MPDP35IN Specifications

General

Brand	Lennox
Model	MPDP35IN
Category	Indoor Fireplace
Language	English