Utica Boilers SFE IV Steam 安装指导

Ventilation of boiler room must be adequate enough to 

provide sufficient air to properly support combustion, 

venting and maintain safe ambient temperatures under 

normal operating conditions.

When the boiler is located in an unconfined space in a 

building of conventional construction frame, masonry 

or metal, infiltration normally is adequate to provide 

air for combustion and ventilation. However, in any 

building which has been altered to conserve energy 

or to minimize infiltration, the boiler area should 

be considered as a confined space. If there is any 

doubt, install air supply provisions for combustion 

and ventilation in accordance with Chapter 5, Air for 

Combustion and Ventilation, of NFPA 31, Standard 

for the Installation of Oil Burning Equipment. The 

recommendations that follow, or applicable provisions 

of the local building codes.

When the boiler is installed in an unconfined space, 

in a building of unusually tight construction, air  for 

combustion and room ventilation must be obtained 

from outdoors or from spaces freely communicating 

with the outdoors. A permanent opening or openings 

having a total free area of not less than 1 square inch 

per 5,000 BTU per hour of total input rating of all 

appliances shall be provided. Ducts may be used to 

convey make-up air from the outdoors and shall have 

the same cross-sectional area of the openings to which 

they are connected.

When air for combustion and room ventilation is from 

inside buildings, the confined space shall be provided 

with two permanent openings, one starting 12 inches 

from the top and one 12 inches from the bottom of the 

enclosed space. Each opening shall have a minimum 

free area of 1 square inch per 1,000 BTU per hour of 

the total input rating of all appliances in the enclosed 

space, but must not be less than 100 square inches. 

These openings must freely communicate with the 

interior areas having adequate infiltration from the 

outside. See Figure #3.

126

26

126

32

63

175

35

175

44

88

259

52

259

65

130

294

59

294

74

147

 
 * A space whose volume is not less than 50 cubic feet per 1000 BTU/Hour of all appliances installed in that space (cubic feet of 

space = height x width x length)
** A space whose volume is less than 50 cubic feet per 1000 BTU/Hour of all appliances installed in that space (cubic feet of space 

= height x width x length)

VENTS

CHIMNEY

OR

L TYPE VENT PIPE

VENT PIPE

BASEBOARD

12"

12"

Asphyxiation, fire hazard. Do not obstruct air 

openings to combustion area. Follow instructions 

below, to maintain adequate combustion air.