Does this mean that I'd only be saving an average of $38/month over the current system (system 2 in the data)?
It is all about the extremity of your climate and the cost of energy in your area.
Natural gas is cheap compared to heating oil, LPG and electric on a heating unit per $ basis. If you were comparing Geo to oil or LPG heating your numbers would be quite different. Enjoy your natural gas while you can!
