It works much as an attic fan would work in a home today.

In the early 50s the company added a "central" or "attic fan" to its inventory.

Though every situation is different, there is some controversy about the effectiveness of attic fans.

The house had no air conditioning, but the big attic fan did a good job.

Range hoods and attic fans (even when not operating) are paths through which air may enter and leave.

"And putting in an automatic attic fan often makes a big difference."

An attic fan is another way to cool a house.

Most attic fans, which range in price from $100 to $200 (not including installation), are thermostatically controlled and operate automatically.

It is similar to the solar-powered attic fan, except that its installation is a little different.

They are typically smaller in size but are more powerful than the solar attic fans.