I recently purchased a house and it doesn't have a vent fan. I intend to install one but I am having trouble figuring out which one to do. I am going to be placing it where the current light fixture is and so I am going to use one with a light built in. There is also only one switch. I was looking at the PB 100H seen here http://www.houseneeds.com/shop/vent/...athkitmain.asp and the marley 8100LA seen here http://www.houseneeds.com/shop/bathk...h_fan_main.asp. What I'm wondering is which one would be more energy efficient and which would be easier to wire a second switch to. Any help would be appreciated.