Q&A / 

Bathroom exhaust fans can dump cold air into rooms if they are not installed correctly. There are several places the cold air enters the bathroom fan exhaust pipe and room. Inferior, low-quality fans are often the problem.

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Ventilation and cooling with whole house fans can be very effective and energy efficient if the air is not highly humid. Open windows in rooms in use while operating these exhaust fans, and the breezes created will be cooling and comfortable. Follow these whole house exhaust fan tips for sizing, installation, air balance, maintenance, safety and other important considerations.

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Whole house fan manufacturers are listed here. Contact them for literature on whole house fans and to inquire about maintenance, sizing and exhaust fan features. They love to hear from us!

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Exhaust fans help maintain a great indoor environment. Indoor activities, especially in the kitchen and bath, produce pollution that needs to be exhausted to the outside. Select the proper sized exhaust fan, install it correctly per manufacturer specifications, and provide for some makeup air, and your home ventilation will do its job.

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Use this table to calculate the Cubic Feet per Minute (CFM) capacity needed for an exhaust fan in a specific room. A ventilation fan should meet at least the minimum standard CFM to provide proper exhaust. Before you install bathroom or kitchen exhaust fans, start here to determine what you need to proceed for proper ventilation.

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Install exhaust fans in the kitchen or bath by following instructions carefully. Most problems with kitchen exhaust fans or bathroom exhaust fans are derived by taking liberties with proper installation as given by the manufacturer. These tips will provide guidance to proper installation of your ventilation fans and avoidance of fire or other unhappy results.

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If humidity in your home is low, and you are getting zapped, you likely have air leaks. Plug them, or get a humidifier. Avoiding condensation within a tight home is not easy, however. You must adjust the humidity down as the outside temperature falls to avoid indoor "rain" on your windows and elsewhere you may not see. Use this relative humidity chart to keep comfortable as the temperature changes.

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