I know cages sizes have been covered over and over, but it appears there isn't really a general consensus.

I'm really liking the idea of the divided 4ft RBI cage, but don't know if it'd be big enough (22x22). I've had my bp in a 40 breeder for years, but it kinda seems like overkill.

I've seen the 3x2x1, but I have a small town home that is being taken over by my newborn daughter, and I like the idea of consolidating my two cages to one.

I also live in Chicago and during the winter our indoor temps can hit 68 degrees so I've always used overhead heat.

So....

-Is 22x22 sufficient for an adult male?
-How would you suggest heating it given that our place can get as cool as 68 degrees?