Fulton FB-S Horizontal Firetube Boiler - Manual (Page 20)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 20
2. Boiler Room Ventilation
a) It is most important to provide free access of air to the boiler. To burn fuel
properly, it requires one square inch opening of fresh air for every 3, 000 BTU
input of fuel.
b) Proper ventilation of the boiler room is essential for good combustion. Install two
make up air openings, one at a low level (24” or 610mm from floor) and one at a
higher level in the boiler room wall. This will provide a flow of air to exhaust the
hot air from the boiler room.
c) The following openings are recommended for each size boiler:
Recommended Minimum Makeup Air Openings
Model FB-S 100 125 150 200 250 300 400 500 650 800 900
Minimum area (in 2 ) 1437 1797 2156 2875 3593 4312 5750 7187 9343 11,500
d) Be sure the total BHP= proper make up air opening size. For instance, if you
have three 300 BHP boilers, it is a total BHP of 900, and the 900 BHP make up
air size is recommended.
Note
These measurements are subject to state and local regulations. The
installation of exhaust fans in a boiler room is not recommended. An
exhaust fan can create down draft in the stack or restrict the burner’s air
supply which will result in poor combustion. It is essential that only fresh
air be allowed to enter the combustion air system. Foreign substances,
such as combustible volatiles and lint, in the combustion system can
create hazardous conditions.
3. Flue and Chimney Requirements
a) The flue from the appliance and the joint between this flue and the chimney are
sealed to prevent leakage of combustion products.
b) The top of the flue or chimney shall be higher than any roof within a radius of 10
meters.
c) Checks are made to ensure that the chimney is suitable for burner and that the
proposed installation complies with the local authority and other regulations
covering such installations.