Terry and I just realized that your cleaning did have an impact on our air quality at our Valley Recycling location. The duct static pressure is supposed to be bet 1-2 (set point is 1.8) and for the longest time (years) it’s been 0.1 – no air exchange. There’s a story but I won’t tell it here. Well, we’ve noticed more air flow from the ducts in the office and I checked the DSP today and it is 1.3 LIKE IT’S SUPPOSED TO BE. Michael mentioned cleaning up yellow jackets (some kind of bug) around the heating coil, that he spent 5.5 hours on the roof cleaning and I think that did the trick. We sincerely appreciate your service and we will schedule you to clean again in two years!