Because it's much more complicated to install a ceiling fan than a ceiling light fixture, you might want to consider having your ceiling fan put in by a licensed electrician. Ceiling fans need additional support from above and need to be anchored solidly to a stud (fan rotation can work metal screws loose.)
When shopping for carpet, ask about the “green label” program. According to the carpet Industry, the label tells consumers that this carpet type has been tested and passed emissions criteria. The label, however, is not a guarantee that the carpet will not cause health problems. A toll-free phone number is available on the label for updated information on the industry’s program.