Electrical – Is GFCI protection required for a dedicated exhaust fan circuit

You can use the switch to operate both the fan and light, if you so choose. In fact, this is a common feature in single user public restrooms. As long as the switch and wiring are rated for the amount of current, which unless you get a huge fan, it should be.

If you have the ability to install a new cable (or pull an extra wire, if the wires happen to be in conduit), you could use a device that has two switches that fit in a single gang box. Which would allow you to control each device separately.

It all depends on several things.

What size is the circuit? What else is one it? What do the manufacturer's instructions say?

Typically you'd only need a dedicated circuit for something like this if it is big enough to warrant it, or if the mfg requires it.

When I say big enough I mean 50% of the circuit size since you are combining a fixed in place appliance (the pump) with general use items.