I don't think that you will have any problem buying a fan - assuming that there isn't one in your apartment already. There is a supermarket on the main road just past the Lamon Hotel that has a basement area selling all manner of domestic equipment and I'm sure that you will find a fan there.
If you are worried about allergies, do try eating at the smaller family-run establishments (like Medousa, Secret Nest, Kastro, Glaros, etc). They will be only too glad to take you into the kitchens and if you give them enough notice, will be happy to cook something special for you.
When you can remember the third question I'll try and answer that one too!
Regards,
Allan