I have a FA4A Bryant fan coil and want to add a dehumidification by running the fan at 50% of the slowest speed. The blower is a 3-tap, 3/4 hp 240V single phase motor, and runs at 1600 cfm at the lowest speed.

I have looked into installing a variable speed drive and build the remaider of the control ckt myself to control the blower, but it (the VFD) seems overkill, and pricey, for this application.

Any suggestions?