CALCULATE CARBON COST OF HEATING

I am looking for someone to help calculate the carbon cost of my heating system. I currently use an electric heating system, and the area being heated is over 2000 square feet. Unfortunately I do not have the energy efficiency rating or the model number for my system, but I do need help understanding the carbon cost of an extraction system. The ideal freelancer for this project should be knowledgeable about energy efficient systems and have experience with calculating carbon costs. This project is time-sensitive, so I need someone who can deliver results quickly and accurately.