There are three different types of ceiling ventilation; ceiling fans and ceiling exhaust fans for use in the bathroom and the attic. Ceiling ventilation is needed to maintain a healthy climate in the home and exhausting warm air from the inside to the outside. Ceiling ventilation is not just something that is employed in warm climates, this is a way of balancing the inside environment regardless of where the home is located in the country. An alternative of course to a ceiling fan is an air conditioner but it only blows cold air into the room whereas a ceiling fan removes warm air, helping to reduce the costs of energy by reducing the amount of air that requires cooling.
Another common type of ceiling ventilation is a bathroom exhaust fan. Bathroom ceiling exhaust fans work in two different ways. The most common bathroom ceiling fan is a propeller type known as an axial fan, these fans have propeller style blades and a pump. The other type is a centrifugal fan which pumps the air from the room using centrifugal force; this design is not as popular as the axial fan.
The objective of a bathroom ceiling fan is to remove odors and moisture that are prevalent in the bathroom. Excessive moisture in the room can quickly lead to the growth of mold, mold cannot thrive if there is air movement and the environment lacks moisture. Bathroom ceiling exhaust fans are normally connected directly to a vent pipe which eventually finds its way to the roof of the house where it is expelled. In homes that have an attic, in many cases the ducting leads to the attic and the moisture moves out of the attic with conventional air flow.
Attic exhaust fans are employed to assist with moving air throughout the house and are used in cooperation with other forms of ventilation. Ceiling exhaust fans that are installed in the attic circulate air in the attic, in the summer the hot air is expelled and in the winter the air is re-circulated through vents. Attic exhaust fans also reduce any build up of humidity that can form; this is done by constant circulation of the air. By circulating the air there is little risk of mold, mildew or the foul odors associated with them.
