Estimated Monthly Savings for Upgrading your Heating System
You will need your current systems efficiency rating (either on a yellow sticker on the unit or you will have to
have a mechanical contractor test it).
Next you'll need the rating of the new system, most new systems will have the energy sticker on the unit.
Using the table below you can get the estimated monthly savings.
Divide that by new system cost and you'll get month till pay back.