Appliance Specifications; Clearances; Gas Vent Rule - Lennox MERIT Series Installation Instructions Manual

LENNOX MERIT

AppLIANCe SpeCIFICATIONS

1-1/2"
7-1/2" (38 mm)
(191 mm)
20-3/16"
(513 mm)
27-7/8"
(708 mm)
Gas Line
Access
20-1/4"
(514 mm)
Left Side
7-13/16"
(198 mm)
Appliance
Top Spacer
1-1/2"
(38 mm)
Figure 2
SERIES B-VENT GAS FIREPLACES • 36" LMBV MODELS • INSTALLATION INSTRUCTIONS
®
36"
(914 mm)
2"
(51 mm)
40"
(1016 mm)
43"
(1092 mm)
Front View
Combustion
Air Inlet
37"
(940 mm)
12-7/8"
17-3/8"
(327 mm)
(441 mm)
3-3/8"
(86 mm)
Gas Line
Access
27-1/4"
(692 mm)
12-1/2"
(318 mm)
40"
(1016 mm)
43"
(1092 mm)
Top View
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
9-5/8"
(244 mm)
37"
(940 mm)
7-3/16"
(183 mm)
Appliance Top Spacer
9-7/8"
(251 mm)
32"
(813 mm)
8-1/8"
(206 mm)
Junction
Box
Right Side
20-1/4"
(514 mm)

CLeARANCeS

Minimum clearance to combustibles for the
appliance is as follows: sides and back - 0" (0
mm), floor - 0" (0 mm), adjacent wall - 0" (0
mm), ceiling - 64" (1625 mm).
venting
Gas vent Rule – Gas vent caps are not permit-
ted within 8 feet (2.4 mm) of a vertical wall
or similar obstruction. Gas vent caps that are
located 8' or more from a portion of a building
which extends at an angle greater than 45°
upward from the horizontal may terminate in
accordance with Table 1 (Figure 3 ), provided
that in no case shall any discharge opening on
the cap be less than 2' (610 mm) horizontally
from the roof surface (National Fuel Gas Code
ANSI Z223.1 (NFPA 54) 7.6.2) (CAN/CGA B149).
12
Roof Pitch is X/12
Minimum Height from Roof
to Lowest Discharge Opening
Figure 3
minimum Height
from Roof to Lowest
Roof Slope
discharge Opening
Feet
Flat to 6/12 1' 0"
Over 7/12 to 9/12 2' 0"
Over 10/12 to 12/12 4' 0"
Over 13/12 to 16/12 6' 0"
Over 17/12 to 21/12 8' 0"
Note: Venting terminals shall not be recessed
into a wall or siding.
Table 1
Multiple Terminations – These appliances may
vent adjacent to and at the same level with any
other gas appliances (including direct-vent
appliances) provided that there is at least 2
ft. (0.6m) between the proximal edges of the
vent caps. These appliances may be vented
adjacent to a chimney vent servicing a solid fuel
fireplace provided the B-vent cap is at least 2
ft. (0.6m) away from the nearest point of the
chimney opening.
X
meters
0.3
0.6
1.2
1.8
2.4
5