Page 9 of Ventilation Fans by Broan-NuTone

broan ventilation fans ­ questions facts why do the windows and mirrors fog even when the fan is running if windows and mirrors are very cold condensation can still form on these surfaces and if your bathroom is sealed tightly replacement air may not be entering the room fast enough to displace the moist air be sure to undercut your door sufficiently to draw fresh air into the room fan placement can also be a factor your fan should be located far from the replacement air source to ensure the moist air is drawn out first finally too many twists and turns in the ducting will significantly reduce the ability of the blower to remove moist air make sure your ductwork is as short and straight as it can be with gradual turns rather than tight corners where necessary why is water dripping from the grille of the fan dripping water is either condensation usually due to cold ductwork or improper duct installation or a problem with the seal on a wall or roof vent insulated ductwork can help solve condensation problems and running the fan longer will ensure moisture is completely removed from the duct ductwork should slope down toward a wall vent to direct condensation out of the exterior vent opening rather than back into the fan housing can i install a heater over the bathtub or in a shower no heaters are not ul listed underwriter s laboratory for installation over a bathtub or in a shower can i use an inline or multi-port fan in one large bathroom yes this works the best for large rooms because you can install the ports over the areas where the ventilation is needed the most source control the size of the multi-port would be determined by the size of the room does a duct-free bath fan expel air no a duct-free fan is not a ventilating device it does not remove air from the room what type of duct is recommended rigid or flexible it is recommended where possible to use rigid duct it has less resistance to air flow and allows the fan to operate much more efficiently if aluminum flexible duct is used be sure the duct is as straight as possible can i exhaust my fan into my attic instead of out the roof or wall never exhaust air into spaces within walls ceilings attics crawl spaces or garages humidity may damage the structure and insulation what type of exhaust fan is best for a sauna or hot tub area high cfm-rated devices are normally recommended for this type of application can i use a fan in a steam shower no since these are normally sealed chambers a vacuum will be created can i vent more than one bath fan out of a roof or wall cap no always follow the manufacturer s recommended ventilation requirements style style is a curious thing to each individual it is something different so broan makes a range of unique products some that stand out others that blend in but all suit every sense of style beautifully can larger diameter ducting be used with my bath fan yes larger diameters will result in improved performance can i use a smaller diameter duct than what the fan is designed for this is not recommended it will cause the fan to run harder greatly reducing the cfm performance of the fan and create excess noise 9

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