I agree with the others who would not offer a fee refund. I too would politely explain the item as an option. As a matter of fact, during the inspection I always tell the client if there is no blower and show them the data plate and model number of the unit. I tell them they can usually obtain the manual online and get information on optional accessories such as blowers, remotes, etc.... I never report lack of a blower. If a blower is present but not working, I do report that.