Airborne illnesses are caused by pathogenic microbial agents and transmitted through the air. They are discharged through coughing, sneezing, laughing or though close personal contact. These pathogens ride on either dust particles or small respiratory droplets and can stay suspended in air and are capable of traveling distances on air currents.
Cooling and heating costs take up to 45% of the average family's utility bill. One dollar ($1.00) out of every $5.00 spent on cooling and heating is lost due to leaks in duct systems in new houses. Heating Efficiency: Furnaces are rated by the Annual Fuel Utilization Efficiency (AFUE) ratio, which is the percent of heat produced for every dollar of fuel consumed. AFUE works a lot like the miles-per-gallon rating on your car-- the higher the rating, the lower your fuel costs. Cooling Efficiency: The measure for the efficiency of air conditioners and heat pumps is the Seasonal Energy Efficiency Ration (SEER), which compares cooling output to electrical consumption over a range of temperatures. The higher the SEER, the less the unit will cost to operate.