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Top Vent DVP-TRAP1 Exception
For installations that are top vented and horizontally terminated with a 90 degree elbow directly off the appliance
and minimum vent run, a termination cap with effective length equal to the DVP-TRAP1 is REQUIRED. Interior and
exterior wall sheathing 1/2 inch thick and 2 X 4 exterior wall studs are also assumed for this scenario.
SHEATHING 1/2 IN. THICK
4-1/2 IN.
2 X 4
(3-1/2 IN.)
Figure 3.9 DVP-TRAP1 Exception (2 x 4 Construction)
Majestic • MER36N, MER36L, MER42N, MER42L Installation Manual • 2595-980 Rev. B • 5/23
20
EXTERIOR
BACK OF APPLIANCE TO
WALL SHEATHING
INTERIOR SHEATHING
1/2 IN. THICK
DVP90ST
1/2 IN. MIN.
CLEARANCE
5 IN. MIN
J* = 5 INCHES TO
FRONT OF DVP-TRAP1
TERMINATION CAP
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