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Exhaust fans for Kitchens and Bathrooms

Bathroom exhaust fans and kitchen exhaust fans (with light, eventually) are an excellent way to avoid moisture.

See also: Kitchen ligthing  and bathroom lighting


Moisture & Exhaust fans

Bathroom and kitchen exhaust fans remove moist air, and helps prevent problems as mildew and mold. In the case of bathrooms you just need to run the ventilating fan during your showers and baths, and some minutes after it (around 15 minutes or a little more). In kitchens, run ventilating fans during and some minutes after cooking...


Bathroom Exhaust Fans & Capacity

The capacity of bathroom exhaust fans is measured by the volume of air exhausted within a certain period of time (CFM). To find the fan capacity you may multiply the bathroom square footage by 1.1 (for an 8ft ceiling/2,5m) or 1.5 (for a 9ft/2,75m ceiling). An example: a 5ft x 10ft bathroom (50 square feet) needs a 55 CFM/75 CFM minimum exhaust fan (for a ceiling 8 feet or a ceiling of 9 feet, respectively).

Some exhaust fans also include heaters (for winter months, to warm up the bathroom, in the case of bathroom exhaust fans), which demands an additional switch.


Installing the bathroom exhaust fan

Exhaust fans installation differ by model. There are many particularities and details (an example: some simpler fans allow insulation to be right next to the fan housing, but most of them - particularly those with lights or heaters - require dams between the joists and a reasonable distance between the fan and the insulation material). Fan manufacturers include specific installation rules in their products – which you should study and follow with care. Installing is not a just a question of connecting the duct to the fan housing. 

See also: Ceiling fans installation


Bathroom exhaust fan & Lighting

Many exhaust fans models include a light kit – which can be an energy efficient fluorescent light bulb. Choose a qualified model (Energy Star…) with a fluorescent light, to get higher energy savings.

Exhaust fans with light, use separate switches: one for the fan and one for the light source (and eventually a third one for a night light).



See also:
House Lighting Basics
Low-voltage outdoor lighting kits;
Outdoor solar lighting.
Landscape lighting design
The Lighting Association


 
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