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A sone is a unit for measuring sound on a linear scale. The lower the sone value of a fan, the more comfortable the listening environment will be. One sone is equivalent to a quiet refrigerator. The quietest possible sone rating is < 0.3 sones.

C.F.M. is short for Cubic Feet per Minute (cu ft/min). This measurement is used to determine the velocity at which air flows into or out of a space. Choose a fan with a CFM rating appropriate for your room size to ensure adequate ventilation. Note: A typical air conditioner produces about 400 CFM for each ton of its cooling capacity. One CFM equals about 28.31 liters per minute.

Static pressure, or hydrostatic pressure as it is sometimes called, is the measurement of airflow resistance as it is pushed through ductwork which reduces the performance of the fan.

Continuous ventilation provides today's airtight homes with a relatively constant and controlled lower level of ventilation. S&P's Premium CHOICE Series are ideally suited for these applications.

For bathrooms less than 100 square feet, determine the room's CFM requirements by measuring and multiplying the length, width and height of the room's ceiling, then use the multiplication factor 0.13 and round up to the next tenth inch. For example: 11-3/8" long x 10-1/2" wide x 7-5/8" height x 0.13 ≅ 118.4", select a bath fan with at least 100 CFM. If the bathroom is larger than 100 square feet, www.HVI.org recommends that you add the CFM requirement for each fixture present - a toilet is 50 CFM, a shower is 50 CFM, a bathtub is 50 CFM and a jetted tub is 100 CFM. For more information download the product catalogue or call our Technical Services division at 1-866-733-0233.

No. Range hoods are specifically designed to handle grease and high temperature environments. Ventilation provided by S&P Canada fans are only a supplement for odor and moisture removal in the kitchen.

The Home Ventilating Institute recommends that a fan should be left on for 20 minutes more too clear humidity adequately and to make sure moisture and condensation in the fan or ducting is minimized.

S&P Canada 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 option of humidity sensing, or timer control. Just set it and forget it.

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.

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 seated too tightly at the bottom in order to allow "makeup air" to enter the room when the door is closed.

If windows and mirrors are very cold, condensation can still form on these surfaces and if your bathroom is tightly sealed replacement air may not be entering the room fast enough to displace the moisture in the 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 moisture in the air is drawn out first. Finally, too many twists and turns in the ducting will significantly reduce the ability of the blower to remove moisture in the air. Make sure your ductwork is as short and straight as it can be, with gradual turns rather than tight corners where necessary.