Page 5 of Bath/Ventilation Fans & Heating Products by NuTone

nutone ventilation fans ­ questions facts nutone ventilation fans ­ questions facts everything you need to know about home ventilation what is a sone and how is it measured a sone is a measurement of sound in terms of comfortable hearing level for an average listener the lower the sone value the more comfortable the listening environment sones are not decibels or volume but rather how sound is sensed one sone is the equivalent of a quiet refrigerator what does cfm mean cfm is the acronym for cubic feet per minute the measure of air volume moved by the fan blower choose a fan with a cfm rating appropriate for your room size to ensure adequate ventilation what is continuous ventilation continuous ventilation provides today s airtight homes with a relatively constant and controlled lower level of ventilation nutone s extremely quiet and efficient ultra silent series is ideally suited for these applications tm will a ceiling fan or wall-mount utility fan serve as a range hood no range hoods are specifically designed to handle grease and high temperature environments nutone bath fans supplement odor and moisture removal in the kitchen but are not intended for use as a range hood what does static pressure mean static pressure is the measurement of airflow resistance as it is pushed through ductwork which reduces the effectiveness of the fan learn more on the home ventilating institute web site www.hvi.org option of humidity sensing or timer control just set it and forget it what are the timer features delay-off timers automatically shut your fan off after a specified time interval it s a nice feature in high traffic bathrooms where you may wish to let the fan run to clear moisture adequately a timer counts down the minutes of fan operation selected by the user where should the exhaust fan be located exhaust fans should be located in or near the shower or tub and in an enclosed water closet keep exhaust points opposite the supply air source to ensure that the fresh air is drawn through the room bathroom doors should not be sealed too tightly at the bottom in order to allow makeup air to enter the room when the door is closed how do i size a fan properly for my room size and the duct run see the sizing guidelines on page 7 for details on proper sizing this section provides an explanation and examples to help you make the right decision where is the exhaust outlet on the ventilation fan the exhaust outlet is the point where air is discharged through the body of the fan housing into the ductwork during installation orient your fan with the exhaust outlet pointing toward the exit vent on your roof or wall to minimize turns in ductwork that impede airflow air quality nutone has long been a leader in indoor air quality solutions our spot ventilation products for bathrooms and kitchens control problems at the source for whole-house filtration and ventilation our fresh air systems set the standard 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 style style is a curious thing to each individual it is something different so nutone makes a range of unique products some that stand out others that blend in but all suit every sense of style beautifully 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 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 the 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 can i mount nutone fans above my tub and shower most nutone fans are rated for use over a shower or bathtub with a gfci ground fault circuit interrupter can my ceiling fan be surrounded by insulation yes nutone bath fans are designed to provide adequate cooling for motors and lighting as well as products with integral heaters will nutone fans work in wall-mount applications some nutone bath and utility fans may be wall mounted see the spec matrix for specific models improper installation may affect fan life safety and your warranty 8 how long should a bath fan run after a shower is used the home ventilating institute recommends that a fan should be left on for 20 minutes more to clear humidity adequately and to ensure moisture and condensation in the fan body or ducting is minimized what should i do if i can t wait for moisture to clear but i don t want a fan to run all day long nutone has sensing fans that detect the humidity rise caused by a shower and turn on automatically when moisture has cleared it turns off some wall controls also give you the 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 can larger diameter ducting be used with my bath fan yes larger diameters will result in improved performance 9

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