(1)
Except as provided in Sentence (2), where a fuel-fired appliance is installed in a farm building containing a Group G, Division 3 major occupancy, separate combustion air and flue systems shall be provided.
(2)
Sentence (1) need not apply where the fuel-fired appliance
(a)
is specifically designed as a generator of carbon dioxide for enrichment of the atmosphere in the farm building, and
(b)
conforms to CSA B149.1, “Natural gas and propane installation code.”