Vintage 20 inch industrial machine-age window intake/exhaust fan

Vintage Brenner industrial adjustable window fan with sliding baffles to seal the window. This fan runs well and can intake or exhaust the air at either high or low speed.

This fan measures 20" across the blades (it moves a lot of air!) and about 25 1/2" high over the box. The with adjusts from about 28 to about 37". This fan is about 4" deep over the box and 9" deep overall.

This has a long (about 9') power cord. This has been repainted at some time with two different shades of green and we saw 3 old broken (or maybe never made) welds on the wire cage.