As a small business that is renovating an old building, I paid a large amount of money to be told to seal window, update my HVAC unit, and insulate my roof. I dont need to pay an engineer money to tell me the obvious. I was also promised a significant rebate from Columbia Gas and only entered into the agreement because of that (hoping I would also learn some energy saving info that I didnt already know). But I received no rebate and no useful information. Highly disappointed and was a waste of my money.