Moxie & Nexus - I have floor heat vents in every room in the house (2 in the living room.) I have had 6 ferrets total since 1999 (3 now) and for the most part they all pretty much ignore the vents. When my little baby Tino (who is now at the bridge) first came home he was a 7 week old kit & he loved it when the heat was coming up out of the vent. He was just about the same size/length as the vent, and he would stand on top of it, lower his belly to the floor/vent & then rub himself back & forth over it! I always worried that he would burn his little furry belly, but it never seemed to bother him, he loved it!! It was quite the cute site to behold. Just make sure you don't forget to screw ALL the vents to the floor carefully. Once the vent cover under the couch in the living room was not screwed down (unbeknownst to me!) and Blitz kept ending up in my bedroom every day (where the door is ALWAYS closed to prevent entry to the non-ferret-proofed hoomins only room) and I could not figure out HOW for the life of me. After a couple weeks I happened to catch him at just the right time emerging FROM the vent in the bedroom!! Scared the heck outta me cuz I was worried he'd come up inside the furnace instead of the bedroom one time! Thankfully that never happened, both vent covers were screwed down & no further incidents have happened. Good luck & enjoy your babies! Jacci & the Psycho Circus Kira the Wonder Fert, Danny Phantom & Shakespeare the Courageous & the 2nd class citizens aka the cats: Tigger, Angel & Ace [Posted in FML 5588]