Villains are evil, however if someone is an Heating and A/C villain you better watch out! It was discovered that an evil villain was somehow using Heating and A/C units to destroy the world. At any given point, she could trigger an a/c or oil furnace plus cause it to spew out toxic poison. She seemed to only target her enemies. Everyone was scared to use their oil heating systems plus central a/cs, plus instead they just ran their whole home media air cleaners to make sure their air was free of toxins. Heating and A/C servicemans plus cooling specialists all over the world were trying to find the source of these Heating and A/C attacks. I was a young heating serviceman when I started trying to find the problem. I had built several of my own media air cleaners, window a/cs, plus gas oil heating systems before, plus none of them had the toxin problem. I soon discovered that the safest heating units to run in your home were the portable space heating systems plus the hybrid oil furnace. I did some more research plus found that a mini cut a/c was the best cooling option. The government hired me to use one of my Heating and A/C units as a mock Heating and A/C machine in order to find out where the toxins were coming from. I had a suspicion that there was some kind of signal sent to the a/c or oil furnace that made it release toxins into the ductworks. This toxin could seep through any HEPA air filter plus most other air filters. There is a particular line of media air cleaners that could filter out the toxins. Soon both of us would find the enemy.