2 Speed Fan Control Switch for GAF Master Flow Whole House Fans (Not WHFTAN1) - Control Low/High Speed & Off, for 24 in. Direct Drive Fans, 12-Hour Timer Compatible, Easy Installation

I bought this switch as is was specified as the switch to buy for my attic fan. It is solid and does the job, no humming (believe it or not, a poorly made switch can humm) and has a smooth action. The only complaint is that the instructions are vague at best, but I know enough about electricity to know which wire went where.

easy to hook up runs fan two speeds

works as expected