Bill and Tim did a fabulous job cleaning and resealing my voids and joints in my heating and cooling system. They found very large areas where my ductwork was not attached, or in other ways compromised. They patched the voids, and did the aerosol sealing. What a difference in my overall system performance. In the past, in my previous house I had a company come out and “clean” my ductwork and their process was a total waste of my money. The Safety King process is extremely effective and well worth the money. This is a great company to work with and I highly recommend them.