Boiler Installed In A Confined Space, Ventilation Air From Inside - Crown Boiler BWC Series Installation Instructions Manual

Figure 5.1: Boiler Installed In A Confined Space, Ventilation Air From Inside
• If the total volume of both the boiler room and the room to which the openings connect is less than 50 cubic feet
per 1000 BTU/hr of total appliance input, install a pair of identical openings into a third room. Connect addi-
tional rooms with openings until the total volume of all rooms is at least 50 cubic feet per 1000 BTU/hr of input.
• The "free area" of an opening takes into account the blocking effect of mesh, grills, and louvers. Where screens
are used, they must be no finer than ¼" (4 x 4) mesh.
Step 2b: If the boiler is to be placed in an unconfined space the natural infiltration into the boiler room will
provide adequate air for ventilation without additional openings into boiler room.
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