We have a Nutone range hood and its fan is incredibly loud (2.3A,
rated at 8 sonnes). Rather than replace the entire unit we'd like to
simply replace the three position fan toggle switch with a rotary
switch or dial, that will hopefully allow us to run the fan at lower
speeds when tons of airflow isn't necessary.

If anyone has done this project before and can recommend a
specific switch we'd appreciate it. We're looking for one that will
fit cleanly in the existing rectangular toggle switch socket (it's about
1 1/8" x 1/2".

Thanks,
John