Fulton Pulse DWH (PDWH) Domestic Water Heater - Manual (Page 22)

Horizontal Installation
Wall Penetrations
Figure 13
Select the point of penetration where a
minimum of
1 / 4
" per foot upward pitch can
be maintained.
When penetrating a non-combustible
wall, the hole through the wall must be
large enough to maintain the pitch of the
vent and provide sealing.
Use adhesive material to seal around the
vent on both sides of the wall.
When penetrating a combustible wall, a
wall thimble must be used. See next page
Figure 14 for installation instructions. Minimum wall thickness through which
vent system may be installed is 3
1 / 4 ".
Maximum wall thickness through which
vent system may be installed is 20 inches.
Installation
20-PDWH
Figure 13
Typical Combustible Wall Penetration Detail