Big Attic Fan In Old House

Whole house fans and attic fans are often misconceived as the same type of fan and while they may share some similarities they have entirely different purposes.

Big attic fan in old house. One way to minimize this problem is to install an attic fan. The qc es 3100 advanced whole house fan is a new take on the idea of whole house ventilation. Hv1600 whole house fan featured on ask this old house interested to know more about our whole house fan. Whole house ventilation allows you to bring the cooler outdoor air through your windows home and attic space to thoroughly cool and ventilate both the home and attic.

These fans circulate the air within the. This active ventilation system is inexpensive and easy to install. An attic fan will turn on automatically when the attic reaches a preset temperature. Some minor electrical work will have to be done during installation.

This is a very common misconception. Don t avoid ventilating your attic for fear you re letting cold air into the house. The second thing we would do is install a ceiling fan in the bedroom. The basic principle of an attic fan is that it pushes hot air out of your attic space.

If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the manufacturer s warranty. Your actual living space is sealed and insulated at the attic floor the attic is outside this envelope. As the attic fan draws outdoor air into the attic it vents hot stale air out through attached dormers. Cooler outdoor air enters through open windows lowering the indoor temperature.

An attic fan pulls air into the attic from the outdoors using the soffit vents you should already have installed in the eaves. The fan is typically mounted behind a gable end vent but other types are available that exhaust hot air through a roof vent. Back in the 1970s people would call the old fashioned helicopter whole house fans an attic fan. In the late evening or early morning the fan is turned on to exhaust hot air from the house.