33
H. Oponal Room Air for Combuson
a. Provide combuson and venlaon air to the
boiler room or enclosure.
, ANSI Z223.1, or, i
, CGA Standard B149 Code
b. Two Permanent Openings Method:
minimum free area of each opening shall be 1
in.
2
/4000 Btu/hr (550 mm
2
/kW)
1 in.
2
/2000 Btu/hr (1100 mm
2
/
kW)
c. One Permanent Opening Method:
ii. 1 in.
2
/3000 Btu/hr (700 mm
2
/kW)
VII(continued)