The summers in our local section are usually short. The two of us often have years when the whole summer time is freezing & wet. The two of us occasionally don’t even bother to run the cooling system. This past summer time was a single of the hottest on record. As early as the beginning of May, the outside temperature climbed into the eighties. By the end of May, the people I was with and I were getting hot & cold temperatures into the low nineties with excessive humidity. The cooling system struggled to keep up, and despite lowering the temperature control numerous times, the house felt slightly boiling & sticky. I also observed an unpleasant smell wafting in the air & more dust than normal. I finally called an Heating, Ventilation & A/C company to service the cooling system. When he accessed the inner toilings of the system, there was an spine-chilling buildup of dust. There was also mold, bacteria & algae growing inside. The worker told me that the warm, moist environment inside the cooling system is the perfect environment for microbial growth. When the cooling system operates, those spores & harmful toxins can become airborne & introduced into the breathing air, and plus, the buildup of contaminants hinders airflow & causes discomfort, greater energy consumption & higher running costs! Fortunately, a thorough cleaning of the cooling plan solved all of the problems. The worker then suggested that I enroll into a preventative maintenance plan. The plan includes numerous service calls per year to problemshoot, scrub & adjust the cooling system & furnace. I get a discount on parts & labor for repairs, priority scheduling & no added fees for overtime service. The professional maintenance also fulfills the warranty requirements.