A whole house fan is a simple and inexpensive method of cooling a house. The fan draws cool outdoor air inside the home through open windows and exhausts hot room air into the attic, throught the venting, and outside. The result is excellent ventilation, lower indoor temperatures, and improved evaporative cooling.  In addition, a whole house fan reduces the need to use expensive air conditioners, saving you money! 

In the summertime, the air inside a home is heated during the hot part of the day. At night especially, and during the morning and late evening, the outside air is often cooler.  It is important to open all or at least several windows, even if only partially, to provide adequate airflow. Closing windows in unused rooms will create higher velocity air movement in occupied rooms.

Running the whole house fan whenever outdoor temperatures are lower than indoor will cool the house. Operate the whole house fan throughout the evening to cool interior materials.  An approximate rule of thumb would be to use the whole house fan when outside temperatures are below eighty-five degrees.

As daytime temperatures rise, turn off the whole house fan. The cool room materials (along with ceiling or circulating fans which create an additional cooling effect) will keep the interior more comfortable.

A Garbeck whole house fan can be used as the sole means of cooling or to reduce the need for expensive air conditioning. Outside air temperature and humidity dictate times when the whole house fan would be best used in place of conventional air conditioning. If both methods of cooling are available, the use of the whole house fan during spring and fall, and during cool summer evenings may yield the optimum combination of comfort and cost.