Temperature problems was prbably most serious concern when I put up my GH this past summer. The GH I purchased came with an electric heater and thermostat (pic), but electricity is costly in Michigan and I purchased a natural gas heater with self-contained blower ___. Of course this means installing gas lines, etc. which I did prior to the GH placement. Even if I have a power failure the gas will still run without the fan circulation but that is better than no heat at all. I am using the electric heater as back-up just in case I have total NG failure.