Does anyone know anything about bathroom ventilation systems? The fairly new Nutone ventilation units in the two bathrooms in my house don't seem to be doing the trick. After a shower, the moisture and steam seems to stick to the walls and mirror and does not dissipate for some time. The bathrooms are not large -- about 40 sq. ft. I've already called two electricians.

One recommended installing Panasonic 110 cfm exhaust fan units in each bathroom. He said he has no stake in what I choose because he makes his money on the labor, but that the supplier (who also sells FanTech products) said the Panasonic was a superior product.

The second recommended installing a FanTech 230 cfm unit in the attic and then running ductwork connecting that fan to vents in both bathrooms. He said that a ceiling unit like the Panasonic (and my Nutone) merely moves the air around and doesn't have sufficient force to pull the humid air out like the FanTech product.

I don't know the cfm of my current fans, but I think they're less than 110. Any suggestions are greatly appreciated!