You can't kid us. The power is out; you have a generator. Of course you
will run it more than just to pump up water pressure. Furnace... lights...
fridge... tv... you know, civilization. Maybe you can figure out something
about the exhaust (and your generator vents the crankcase blow-by gases to
the air intake) but there's no getting around the issue of indoor gasoline
handling which is dangerous enough to nix this idea regardless of the other
details.

You need to figure out a way to run this outside where it's safe and
sufficiently convenient that you will forget these thoughts. Being able to
have all the comforts SAFELY while your neighbors shiver in darkness is
worth a little extra effort to work out the details in advance.