Indoor Air" Combustion Air Intake - IBC SL 20-160 G3 Installation And Operating Instructions Manual

WARNING
When using Indoor Air options,
adequate combustion air must
be supplied to the boiler room
according to the requirements of
all applicable codes.
INSTALLATION
SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS
Combustion air piping - if used - is inserted directly into the 3" female stainless steel fitting
on the top, right side of the boiler and run horizontally or vertically to the outdoors. Screen
material can be placed at the inlet as appropriate for the environment (e.g. insects, dust).
Care must be taken to ensure adequate separation is maintained between the air intake
inlet and the vent terminal. Refer to the vent terminal configuration drawings in the Vent
Termination section above.
Support should be provided for intake piping, particularly so for horizontal runs (follow
local code).

1.4.8 "Indoor Air" Combustion Air Intake

An "Indoor Combustion Air installation", as described herein, is one in which air for
combustion is taken from the ambient air around the boiler.
Figure 20: Indoor combustion air intake
To support combustion, an ample air supply is required. This may require direct openings
in the boiler room to the outside. If the boiler is not in a room adjacent to an outside wall, air
may be ducted from outside wall openings.
Provisions for combustion and ventilation air must be made as follows:
• in the USA, in accordance with the National Fuel Gas Code, ANSI Z223.1 (latest
edition), or applicable provisions of the local building codes
• in Canada, in compliance with B149.1-10
1-15