Hello! For all of its customers, Duke Energy provides discount programs for home improvement that include energy savings. To take advantage of their offer, you need to apply, and they will provide a contractor who will do all this, and the company will pay part of the costs. If you pay attention to the reviews here
https://duke-energy.pissedconsumer.com/review.html you will understand. that it is very beneficial for the company's customers, and they constantly use it.