There are many benefits to using exhaust fans in the home or places of business. The main reason is for energy efficiency and the amount of money saved can be significant over a period of time. Window exhaust fans will effectively take the warm air out of a room and draw in clean fresh air. In the summer, attics can become exceedingly hot and exhaust fans will pull in air that is far below the temperature of the attic and blow them outdoors.
When the attic is cooler, the adjacent rooms below will be cooler and cost less to cool by way of air conditioning units. Air conditioning units can suck up a lot of energy and consequently cause your power bill to jump during the hot seasons. Areas of the country that have high humidity levels can cause the motors to become loaded with grime and should be cleaned occasionally to keep them in proper working order.
While most window exhaust fans have only one set of blades, moving enough air, to make a difference in the cost to cool a home, may not be enough. Rather than purchasing an additional system, there are units that have dual fans which can work double time. These types of units can suck in and exhaust air at the same time. This also adds to better cross ventilation.
Working together, they will simultaneously cool the home. Where two story homes exist, window exhaust fans located on the upper level and one on the lower floor will carry fresh air to the second story. Since warm air rises, it is best to suck air in from the outside on the lower floor and exhaust it out through an upstairs room.
Not only is hot air being expelled from the home, the elements of household air such as kitchen and pet odors are pushed out, making the interior environment of the home safer. Bathroom exhaust fans will be a great help with this also. Strategically placing these fans on opposite ends of a home will create a nice draft that will shoot through the entire home. The best window fan is definitely one that will lower your cooling bills and worth the investment while making your home cooler without costing an arm and a leg.