Boiler Room Air Openings - Freestyle 2 Series Manual

FreeStyle
®
2
series

9 Boiler room air openings

Figure 23
Combustion and ventilation air openings for
and ventilation air to be n accordance with the section "Air for Combustion and Ventilation," of the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 - latest edition, or applicable provisions of the local building codes.
The FreeStyle
less than the recommended service clearances shown in Figure 1, page 5.
Air openings
The required air opening sizes below are FREE AREA,
after reduction for louver obstruction. Note the ex-
ception below for large spaces.
** NOTICE:
Requirements for using the SINGLE air opening
option.
SPECIAL EXCEPTION FOR LARGE SPACES
FreeStyle
®
( WITH other appliances in room
only):
20
-
wall mount gas fired water boiler
boiler CANNOT be in the same space with other appliances if clearances around the FreeStyle ® are
®
appliances in room
of all other appliances in the room
(Unless specified otherwise by ap-
of all other appliances in the room
of all other appliances in the room
(Unless specified otherwise by ap-
of all other appliances in the room
of all other appliances in the room
(Unless specified otherwise by ap-
of all other appliances in the room
of all other appliances in the room
(Unless specified otherwise by ap-
A single combustion air opening can be used for cases b, c or d above (
with other appliances in room only), sized as listed, provided that:
•
•
•
NO combustion air openings are needed if the boiler (and other appliances) are installed
in a space with a volume NO LESS than 50 cubic feet per 1,000 Btuh of all appliances
in the space. That is, total the input of all appliances in MBH (1,000's of Btuh), then
multiply this total times 50. The building MUST NOT be of tight construction.
Example: For a total input of 500 MBH (500,000 Btuh), the minimum volume would
be 50 x 500 = 25,000 cubic feet.
FreeStyle
®
Direct Vent installations. Provisions for combustion
FreeStyle
boiler
®
WITH other
TWO openings, each at least:
1 square inch per 1,000 Btuh
pliance manufacturer)
TWO openings, each at least:
1 square inch per 4,000 Btuh
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
pliance manufacturer)
TWO openings, each at least:
1 square inch per 4,000 Btuh
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
pliance manufacturer)
TWO openings, each at least:
1 square inch per 2,000 Btuh
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
pliance manufacturer)
The single opening must communicate directly to the outdoors or to a space that
communicates directly with outdoors (NOT to an interior space).
The top of the opening must be within 12 inches of the ceiling.
The free area of the opening must be at least equal to the sum of the areas of all
equipment vent connectors in the space.
–
boiler manual
FreeStyle
®
WITHOUT other
appliances in room
NO openings are required if the boiler
installation provides at least the rec-
ommended service clearances shown
in Figure 1, page 5.
Provide openings ONLY as shown
in Figure 1, page 5.
Each opening must have a free
area no less than 1 square inch per
1,000 Btuh input of the boiler.
Part number 550-142-950/0122
boiler
®
FreeStyle