Venting And Combustion Air; Combustion Air - Laars NEOTHERM NTH Installation And Operation Instructions Manual

N T Boilers and Water heaters
eo herm
Section 3 -

VENTING AND COMBUSTION AIR

3.1 Combustion Air
NeoTherm boilers and water heaters must have provisions
for combustion and ventilation air in accordance with the
applicable requirements for Combustion Air Supply and
Ventilation in the National Fuel Gas Code, ANSI Z223 1; or in
Canada, the Natural Gas and Propane Installation Code, CSA
B149.1. All applicable provisions of local building codes must
also be adhered to.
A NeoTherm unit can take combustion air from the space
in which it is installed, or the combustion air can be ducted
directly to the unit. Ventilation air must be provided in either
case.
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.
Size
80
105
150
199/210
285
399
500
600
750
850
Concentric vent terminal = 10 ft. pipe length
Table 3a - PVC Vent Terminal Kits
PRO TECH (FasNSeal)
SIZE Boiler
Adapter Termination
399-600
F303759
FSRC4(R.C)
750-850
F303759
Table 3b - Approved Stainless Terminations and Adapters
MATERIAL
ABS
PVC, sch 40
CPVC, sch 40
Single wall galv. steel
Table 4 - Required Combustion Air Pipe Material
HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS
2" PVC
incl. opt. opt.
incl. opt. opt.
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
Flue Intake Air Boiler
Termination Adapter
FSBS4 FSAIH04 KB285600
303888
FSBS6 FSAIH04
303888
UNITED STATES
ANSI/ASTM D1527
ANSI/ASTM D1785 or D2665
ANSI/ASTM F441
26 gauge
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
not be less than the sum of the areas of all vent connectors in
the confined space.
3" PVC
opt. opt. opt.
opt. opt. opt.l
incl. opt. opt.
incl. opt. opt.
opt. opt. opt.
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
HEAT FAB (Saf-T-Vent)
Intermediate Flue
Adapter Termination Termination
9454BUREZ-1* 9492 9414TERM
5400CI
INSTALLATION STANDARDS
based upon the intended application of the boiler.
4" PVC 6" PVC
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
incl. opt. n/a
incl. opt. n/a
incl. opt. n/a
incl. opt. opt.
n/a opt. incl.
n/a opt. incl.
Z FLEX (Z-Vent)
Intake Air Boiler Flue
Adapter Termination
2SVSLA04 2SVSTP04
2SVSRCX04
CANADA
Air pipe material must be chosen
Page 9
Intake Air
Termination
2SVSTEX0490