I noticed a heavy amount of dust & dirt on the surfaces in my home. I looked to see if the air filter was clean. I removed the air filter & there was only a small amount of dust. I didn’t know why the air filter was not correctly removing all of the dirt & dust, however I thought that a repair specialist might be able to get to the bottom of the problem. I contacted the Heating as well as Air Conditioning repair center & I told the guy on the PC about the dirt & dust on the surfaces. She said the concern might be dirty HVAC duct. She recommended the cleaning services for the HVAC duct as well as a full repair tune up on the Heating as well as Air Conditioning machine. The cost for both services was under $200, so I stressed both of the services on Tuesday day. Two Heating as well as Air Conditioning service specialists showed up to clean the HVAC duct & the machine, one guy started removing all of the HVAC duct covers while another one of the service men diagnosed the actual machine. I tried not to get in the way, because both men looked like they had a plan. I waited until the men were finished with their tasks & then I asked a couple of questions. The Heating as well as Air Conditioning repair specialists had some information to share with us. They found a build-up of dust & dirt inside of the HVAC duct & advocated that I pay for a professional cleaning & sanitizing repair to get rid of the dirt & dust. It was going to cost even more money to repair the issue.