Operation of exhaust fans, kitchen ventilation systems, clothes dryers, swamp coolers, or fireplaces may create conditions requiring special attention to avoid unsatisfactory operation of installed gas appliances.
Gas-burning appliances installed in rooms ventilated by exhaust fans shall be protected against the possibility of the fan pulling a down draft on the appliance vents. This may be done by the installation of an induced draft fan or blower in the appliance vent or permanent fresh air opening to the room from the outside. Operation of exhaust fans, kitchen ventilation systems, clothes dryers, or fireplaces shall be considered in determining operation of installed gas appliances.
