I recall a Pre-whirlpool RCA AC window unit when I rented in 84, never quite got my BR below 80, just not muggy. The compressor starting dropped the line voltage at the other end of the 1940s house
The room had corner-wrapping casement window, I had aluminum foil all over it on inside. A brick house in TX, this place was a hot box with a silly old gas wall waffle-looking job for heat, never used it, just smelled the pilot