BuckMaster FP-BR-10-ZC, Manual

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Page 16
AIR FOR COMBUSTION
AND VENTILATION FROM INSIDE BUILDING
This fresh air would come from an adjoining unconfined space. When venting to an adjoining space,
you must provide two permanent openings: one within 12" of ceiling and one within 12" of floor on
wall connecting two spaces. (See Options 1 and 2, Figure 7.) You can also remove door into adjoining
room. (See Option 3, Figure 7.)
WARNING
REWORK WORKSHEET, ADDING SPACE OF ADJOINING UNCONFINED SPACE.
COMBINED SPACES MUST ADEQUATE AMOUNT OF AIR TO SUPPLY ALL
APPLIANCES IN BOTH SPACES.
NOTE: Each opening shall have a minimum free area of 1 square inch per 1000 BTU’s per hour of
total input ratings of all gas utilization equipment in confined space, but not less than 100 square inches.
Figure 7 Ventilation Air From Inside Building
A. Rework worksheet, adding space of an adjoining room. If extra space provides an uncon-
fined space, remove door to adjoining room or add ventilation grills between rooms. See
“Ventilation Air From Inside Building”, page 21.
B. Vent room directly to outdoors. See “Ventilation Air From Outdoors”, page 22.
C. Install a lower BTU/Hr heater, if lower BTU/Hr size makes room unconfined.
If actual BTU/Hr used is less than maximum BTU/Hr space can support, space is an
unconfined space. You will need no additional fresh air ventilation.
WARNING:
YOU MUST PROVIDE ADDITIONAL VENTILATION AIR IN A UNUSU-
ALLY TIGHT CONSTRUCTION.