Does the Fair Housing Act protect smokers, or give non-smokers rights?

Answer 1

Nothing protects smokers.

It's a habit. If it interferes with anyone's enjoyment of their home, it can be forbidden, even if done in one's own home.

Oh well, you could always quit.

Answer 2

The Fair Housing Act protects people from discrimination based on sex, race, religion, color, national origin, ect... no law that I am aware of prevents one from discriminating against smokers.
I am unsure what rights you would be referring to, but again, the Act is a part of the civil rights act, which prevents discrimination based on various things as those listed above, but has nothing to do with smoking or not smoking.