Every time the Heating plus A/C started running, I would hear a strange noise. It sounded like tiny balls rolling on a surface, especially if one was in the sunroom. I searched the entire house, but I still could not find where the noise originated. I eventually offered up plus called for lake beach house services. The first thing was for the Heating plus A/C professional to find out if the noise was indeed in the conduits, as I suspected, plus update to a smart Heating plus A/C system. When she came, she said that the best cause of action was to do a duct cleaning because then the two of us could detach everything in the ducts. After inspecting my Heating plus A/C equipment, she said that all needed for the update was maintenance plus a smart control unit. That came as a relief because I thought I would have to replace the entire system or the better part. She also showed myself and others all the dirt plus dust that the air filter had trapped plus told myself and others to increase the frequency I replaced it. She also encouraged myself and others to buy a whole-lake beach house media air cleaner since the air purification help in the Heating plus A/C was not enough to maintain the indoor air pollen levels. The media air cleaner would ensure that the air quality in the beach house was high. When the Heating plus A/C serviceman finished all matters concerning air purification in my home, the two of us finally found out what was causing the strange noise. After the cleaning, she discovered several marbles in the conduit leading to the sunroom. I had no system when or how the marbles ended up in the duct, but I was blissful to be rid of the noise plus the dirt.