Install Instructions

Page 7
NEOTHERM Residential Boilers
not be less than the sum of the areas of all vent connectors in
the conned space.
Other methods of introducing combustion and ventilation air
are acceptable, providing they conform to the requirements in
the applicable codes listed above.
In Canada, consult local building and safety codes or, in
absence of such requirements, follow CAN/CSA B149.
DuctedCombustionAir
The combustion air can be taken through the wall, or
through the roof. When taken from the wall, it must be
taken from out-of-doors by means of the LAARS horizontal
wall terminal, shown in Table 7. See Table 4 to select the
appropriate diameter air pipe. When taken from the roof, a
eld-supplied rain cap or an elbow arrangement must be used
to prevent entry of rain water. (See Figure10.)
Use ABS, PVC, CPVC or galvanized pipe for the combustion
air intake. (See Table 8) The pipe should be sized per Table 2.
Route the intake to the boiler as directly as possible. Seal all
joints. Provide adequate hangers. The unit must not support
the weight of the combustion air intake pipe. Maximum linear
pipe length allowed is shown in Table 4. Subtract 5 allowable
linear ft. (1.5m) for every elbow used.
The connection for the intake air pipe is at the top of the unit.
In addition to air needed for combustion, air shall also be
supplied for ventilation, including air required for comfort
and proper working conditions for personnel. Refer to the
applicable codes.
CombustionAirFromRoom
In the United States, the most common requirements specify
that the space shall communicate with the outdoors in
accordance with method 1 or 2, which follow. Where ducts
are used, they shall be of the same cross-sectional area as the
free area of the openings to which they connect.
Method 1: Two permanent openings, one commencing within
12” (300mm) of the top and one commencing within 12”
(300mm) of the bottom, of the enclosure shall be provided.
The openings shall communicate directly, or by ducts, with
the outdoors or spaces that freely communicate with the
outdoors. When directly communicating with the outdoors, or
when communicating to the outdoors through vertical ducts,
each opening shall have a minimum free area of 1 square inch
per 4000 Btu/hr (550 square mm/kW) of total input rating
of all equipment in the enclosure. When communicating to
the outdoors through horizontal ducts, each opening shall
have a minimum free area of not less than 1 square inch per
2000 Btu/hr (1100 square mm/kW) of total input rating of all
equipment in the enclosure.
Method 2: One permanent opening, commencing within
12” (300mm) of the top of the enclosure, shall be permitted.
The opening shall directly communicate with the outdoors
or shall communicate through a vertical or horizontal duct
to the outdoors or spaces that directly communicate with the
outdoors and shall have a minimum free area of 1 square inch
per 3000 Btu/hr (734 square mm/kW) of the total input rating
of all equipment located in the enclosure. This opening must
INSTALLATION STANDARDS
MATERIAL UNITED STATES CANADA
ABS ANSI/ASTM D1527
PVC, sch 40 ANSI/ASTM D1785 or D2665 Air pipe material must be chosen
CPVC, sch 40 ANSI/ASTM F441
based upon the intended application of the boiler.
Single wall galv. steel 26 gauge
HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS
Size
2” PVC
3” PVC
4” PVC
6” PVC
Standard Concentric CA006000 Flush Mount CA010100 Standard CA005900 Concentric 239-44069-01 Flush Mount CA010101 Standard Flush Mount CA010102 Standard
80
incl.
opt.
opt.
opt.
opt.
opt.
n/a
n/a
n/a
105
incl.
opt.
opt.
opt.
opt.
opt.l
n/a
n/a
n/a
150
n/a
n/a
n/a
incl.
opt.
opt.
n/a
n/a
n/a
199/210
n/a
n/a
n/a
incl.
opt.
opt.
n/a
n/a
n/a
285
n/a
n/a
n/a
opt.
opt.
opt.
incl.
opt.
n/a
399
n/a
n/a
n/a
n/a
n/a
n/a
incl.
opt.
n/a
500
n/a
n/a
n/a
n/a
n/a
n/a
incl.
opt.
n/a
600
n/a
n/a
n/a
n/a
n/a
n/a
incl.
opt.
opt.
750
n/a
n/a
n/a
n/a
n/a
n/a
incl.
n/a
opt.
850
n/a
n/a
n/a
n/a
n/a
n/a
incl.
n/a
opt.
Concentric vent terminal = 10 ft. pipe length
HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS
Size
2” PVC
3” PVC
4” PVC
6” PVC
Standard Concentric CA006000 Flush Mount CA010100 Standard CA005900 Concentric 239-44069-01 Flush Mount CA010101
Standard Flush Mount CA010102 Standard
80
incl.
opt.
opt.
opt.
opt.
opt.
n/a
n/a
n/a
105
incl.
opt.
opt.
opt.
opt.
opt.l
n/a
n/a
n/a
150
n/a
n/a
n/a
incl.
opt.
opt.
n/a
n/a
n/a
199/210
n/a
n/a
n/a
incl.
opt.
opt.
n/a
n/a
n/a
285
n/a
n/a
n/a
opt.
opt.
opt.
incl.
opt.
n/a
399
n/a
n/a
n/a
n/a
n/a
n/a
incl.
opt.
n/a
500
n/a
n/a
n/a
n/a
n/a
n/a
incl.
opt.
n/a
600
n/a
n/a
n/a
n/a
n/a
n/a
incl.
opt.
opt.
750
n/a
n/a
n/a
n/a
n/a
n/a
incl.
n/a
opt.
850
n/a
n/a
n/a
n/a
n/a
n/a
incl.
n/a
opt.
Concentric vent terminal = 10 ft. pipe length
Table7. -PVCHorizontalIntakeandExhaustVentTerminalKits
Table8. -RequiredCombustionAirPipeMaterial