the filters are clean. Air Handler The portion of your air conditioner or heating system that forces air through your homes ductwork. BTU Stands for British Thermal Units. This number... indicates the amount of heat it takes to raise one pound of water one degree Fahrenheit. The higher the BTU rating, the larger the heating capacity of the furnace or air... conditioner. Homes are measured to determine the number of BTUs required from a heating or cooling system. Carbon Monoxide watch just go with it full movie online filme hereafter online A...