Personally, I would. After I got a look at a dirty duct, I decided it can’t be a bad thing. I also can’t say that I notice a difference, but just knowing all that junk isn’t in my ducts makes me feel better. Even without remodeling, the buildup is unbelievable. I just bought a new (new for me – 20 yrs old) house and it was one of the first things I did. I had it done at my old house after years of remodeling.