There was an HVAC infiltration once in a secluded HVAC-free city. This huge city was on an island in the middle of nowhere. This place was dedicated for those who did not want air conditioning or furnaces in their life. It was for those who believed that central air conditioners and furnaces like hot water boiler heating systems cause cancer and other diseases. They didn’t even have a furnace for the cool winter months, instead they just built large fires. In the hot summers, they would make fans, but they would never use any type of air conditioner. They believed that the coolant inside of window air conditioners and other a/c units would cause cancer and would spread toxic air through the air ducts of their home. One day, a young man who was born into this city wanted his own window air conditioner. He didn’t like this HVAC-less society, but they would not allow him to leave, so he went on the internet and found out how to build a small window air conditioner. He made coolant and air ducts from scratch. After several weeks of work, he finally built a small window air conditioner. He later converted it into a mini air conditioner so that no one could see it from the outside. He enjoyed having a cool room. He built hundreds more of these miniature air conditioners and sold them to others who were stuck there but still wanted their own HVAC unit. This young man aso built small portable space heaters to keep him warm in the cool winter.