Three times last year, I ended up with a exhausting sore throat & laryngitis. My doctor proposed doing something to help the air quality in my home. I never thought the air quality could affect my health so poorly. Since the air inside the current home was dry & arid, it was having an adverse affect on my health, during the night, I was sleeping with my mouth open. The dry air was irritating my throat & larynx. Even worse, the dry air was filled with contaminants that were causing myself and others to get sick. I had to pay a specialist to examine my air quality. They carefully examined every square inch of my lake house for problems. They found black mold inside my HVAC ducting system, which was the likely cause for my distress. They performed a thorough cleaning of the HVAC ducting system. They cleaned & sanitized each piece of HVAC ducting equipment. They had a long brush that had an stretchy head. The brush cleaned every square inch of the HVAC ducting system. I could see the brush moving in & out of the HVAC duct, because the crew used a special camera to view the interior areas of the HVAC duct. It was really interesting to see all of the weird & cool gadgets they used to scrub the HVAC duct. There was no way I could have reached all of the crevices inside. They were able to scrub every nook & cranny with those specialty tools. The air quality in our lake house is much better now, thanks to the work of our Heating & Air Conditioning team.