rootboy, I live in an old brick house that was built in either the 1920s or 1930s. Sometime in the 50s, someone installed one of those super deluxe chrome-plated fans, made by Homart for Sears & Roebuck. There's literally a big hole in the wall, going outside, with a hood over it on the outside to keep the weather out there. The electric motor is a 3-speed, with a rotary chicken-head knob on the wall, & the highest speed sounds like the whole house is trying to lift off the ground.