8
Description
Location
Distance
in. (mm)
a.
3-1/2" (89 mm) thick
masonry walls without
ventilated air space
Back
9 (229)
Right
9 (229)
Left
9 (229)
Vent
5 (127)
Indoor Top
39 (991)
Outdoor Top
Unobstructed
b. 1/2" (13 mm)insulation
board over 1" (25 mm)
glass fiber or mineral
wool batts
Back
6 (152)
Right
6 (152)
Left
6 (152)
Vent
3 (76)
Indoor Top
30 (762)
Outdoor Top
Unobstructed
c. 0.024 sheet metal over
1" (25 mm) glass fiber
or mineral wool batts
reinforced with wire on
rear face with ventilated
air space
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
d. 3-1/2" (89 mm) thick
masonry wall with
ventilated air space
Back
6 (152)
Right
6 (152)
Left
6 (152)
Vent
6 (152)
Indoor Top
39 (991)
Outdoor Top
Unobstructed
e. 0.024 sheet metal with
ventilated air space
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
2 (51)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
f. 1/2" (13 mm) thick
insulation board with
ventilated air space
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
g.
0.024 sheet metal with
ventilated air space over
0.024 sheet metal with
ventilated air space.
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
h.
1" (25 mm) glass fiber
or mineral wool batts
sandwiched between two
sheets 0.024 sheet metal
with ventilated air space
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
Derived from National Fuel Gas Code, Table 10.2.3
Table C. Reduction of Clearances to Protected Surfaces
Heaters must not be installed under an overhang of less
than three 3' (0.9 m) from the top of the heater. Three sides
must be open in the area under the overhang. Roof water
drainage must be diverted away from the heaters installed
under overhangs with the use of gutters.
For U.S. installations,
the point from where the flue
products exit the heater must be a minimum of 4' (1.2 m)
below, 4' (1.2 m) horizontally from, or 1' (0.3 m) above any
door, window or gravity inlet into any building. The top
surface of the heater shall be at least 3' (0.9 m) above
any forced air inlet, or intake ducts located within 10' (3 m)
horizontally.
For Canadian installations,
pool heaters shall not be
installed with the top of the vent assembly within 10' (3 m)
below, or to either side, of any opening into the building.
Refer to the latest revisions of CAN/CSA-B149.
A minimum of 6
'
(1.8 m) is required from the heater to an
inside corner wall for proper outdoor venting.
For installations in Florida and Texas,
that must comply
with the Florida or Texas Building Code, follow the directions
shown in
for the installation of hurricane tie-down
brackets for all models.
Forced Air Inlet
4' (1.2 m)
Minimum
3' (0.9 m)
Minimum
10' (3 m)
Minimum
1' (0.3 m)
Minimum
4' (1.2 m)
Minimum
4' (1.2 m)
Minimum
Figure 3.
Clearances
Pagoda Top Installation
1. Insert tabs into keyhole (4 places). See
,
detail A.
2.
Snap tabs into keyholes so as not to pull out. See
OUTDOOR TOP
(SHIPPED LOOSE WITH HEATER)
DETAIL A
DETAIL B
Figure 4. Outdoor Top Installation
Indoor Heater Installation
The heater is also design-certified for indoor installation
when equipped with the approved drafthood.
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11/22/2019 10:44:38 AM