When my friends and I were finally able to rent a family house in college, we were thrilled to move out of the dorms. At last, we had a spot to park our cars, our very own yard, and a full property all to ourselves. Although the home was extremely old and somewhat rundown, it had 3 bedrooms, two full bathrooms, as well as a big kitchen. We couldn’t wait to invite friends over and have parties! The rent was really cheap and the location was perfect, but we had to pay for the utilities. My roommates and I agreed to be very conservative with the thermostat settings. We decided to operate the air conditioner and furnace only when absolutely necessary. We threw a party late one September, and the weather turned unseasonably hot and muggy. With fifty people packed in the house, it got horribly hot and sticky. We first tested out opening the windows, but nearly all of them were painted shut. We then set up a bunch of box fans, but they blew fuses. With essentially no other choice, we lowered the thermostat and started up the air conditioning. We expected a steady flow of wonderfully cool air to circulate and keep everyone perfectly comfortable. Instead, we got heat that smelled musty, and too much dust. I think the air conditioner actually made the home warmer, and everybody started getting queasy. The house smelled so terrible, we had to move the party outside into the hot sun and humidity. After that, we were a bit scared to start up the furnace. In turn, we called the landlord and discussed our safety issue concerns. We were relieved when he agreed to send an HVAC technician to help service the heating system.