Table of Contents
Advertisement
Description
a. 3-1/2" (89 mm) thick
masonry walls without
ventilated air space
b. 1/2" (13 mm)insulation
board over 1" (25 mm)
glass fiber or mineral
wool batts
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
d. 3-1/2" (89 mm) thick
masonry wall with
ventilated air space
e. 0.024 sheet metal with
ventilated air space
f. 1/2" (13 mm) thick
insulation board with
ventilated air space
g. 0.024 sheet metal with
ventilated air space over
0.024 sheet metal with
ventilated air space.
h. 1" (25 mm) glass fiber
or mineral wool batts
sandwiched between two
sheets 0.024 sheet metal
with ventilated air space
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
8
Distance
Location
in. (mm)
Back
9 (229)
Right
9 (229)
Left
9 (229)
Vent
5 (127)
Indoor Top
39 (991)
Outdoor Top
Unobstructed
Back
6 (152)
Right
6 (152)
Left
6 (152)
Vent
3 (76)
Indoor Top
30 (762)
Outdoor Top
Unobstructed
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
Back
6 (152)
Right
6 (152)
Left
6 (152)
Vent
6 (152)
Indoor Top
39 (991)
Outdoor Top
Unobstructed
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
2 (51)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
Back
4 (102)
Right
4 (102)
Left
4 (102)
Vent
3 (76)
Indoor Top
24 (610)
Outdoor Top
Unobstructed
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 Figure 7 for the installation of hurricane tie-down
brackets for all models.
4' (1.2 m)
Minimum
4' (1.2 m)
Minimum
3' (0.9 m)
Minimum
10' (3 m)
Minimum
Forced Air Inlet
Figure 3.
Clearances
Pagoda Top Installation
1. Insert tabs into keyhole (4 places). See Figure 4,
detail A.
2. Snap tabs into keyholes so as not to pull out. See
Figure 4, detail B.
DETAIL A
OUTDOOR TOP
(SHIPPED LOOSE WITH HEATER)
Figure 4.
Outdoor Top Installation
Indoor Heater Installation
The heater is also design-certified for indoor installation
when equipped with the approved drafthood.
4' (1.2 m)
Minimum
1' (0.3 m)
Minimum
DETAIL B
Advertisement
Table of Contents
