Three times last year, I ended up with a terrible sore throat and laryngitis. My doctor recommended 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 cabin was dry and arid, it was having an adverse affect on my health, then during the night, I was sleeping with my mouth open. The dry air was irritating my throat and larynx. Even worse, the dry air was filled with contaminants that were causing me to get sick. I had to pay a specialist to examine my air quality. They carefully examined every square inch of my cabin for complications. They found black mold inside my air ducting system, which was the likely cause for my distress. They performed a thorough cleaning of the air ducting system. They cleaned and sanitized each piece of air ducting equipment. They had a long brush that had an bendy head. The brush cleaned every square inch of the air ducting system. I could see the brush moving in and out of the HVAC duct, because the crew used a special camera to view the interior areas of the HVAC duct. It was easily interesting to see all of the different and cool gadgets they used to disinfect the HVAC duct. There was no way I could have reached all of the crevices inside. They were able to disinfect every nook and cranny with those specialty tools. The air quality in our cabin is much better now, thanks to the labor of our Heating as well as Air Conditioning team.