I don't have an IQ110, I have a DigiQ. If you have a bigger pit the 25 cfm fan would be essential. I know some people with big offsets use them. To be safe you could go with a Stoker that has the ability to control up to 4 pits. I've never tried it but I would think you could hook up multiple 25 cfm fans on one pit. Let us know how it goes. Good luck!
FEC120, XL BGE, DigiQ DX2, UDS, Cimarron, Weber Jumbo Joe, Grill Grates, ThermoWorks RT600C