When it's time to enhance the comfort of your home, it's time to call Full Blown Heating and Air Conditioning Inc. Residential & Commercial! Professional Installers - Family Owned & Operated - Same Day Service - Planned Service Agreements - Service All Makes & Models - FREE In Home Estimates - Installation and Replacement - Financing Available - No Overtime Charges - A traditional home comfort system has two parts: an indoor unit, such as a furnace or air handler, and an outdoor unit. An air conditioner is the outdoor unit that cools air and sends it to the indoor unit for circulation through your home. Indoor and outdoor units are designed to work together. When the air conditioner is properly matched with a furnace or air handler, you get maximum efficiency and longer system life. Furnaces heat and circulate warm air in the winter. Furnace heating ability is measured with an Annual Fuel Utilization Efficiency (AFUE) percentage. A higher AFUE percentage indicates a more efficient furnace. A split system heat pump keeps homes comfortable all year long. In summer, it draws heat out of your home to cool it. In the winter, it draws heat from outside air into your home to warm it.