If your heating or cooling equipment is more than 10 years old, it may be time for a replacement. High-efficiency equipment can make your home more comfortable and energy efficient. Consider making a change if any of the following statements apply. Your heat pump or air conditioner is more than 10 years old. Make the switch to a high-efficiency ENERGY STAR® certified unit that can save you up to 30 percent on heating and cooling costs. Your furnace is more than 15 years old. One in four furnaces in U.S. homes today is more than 20 years old. Consider replacing it with a newer, more energy-efficient model. Your home has humidity problems, excessive dust, or rooms that never seem to get comfortable. Improper HVAC equipment operation, inadequate equipment, duct problems or poor insulation could be the cause. Your equipment needs frequent repairs and your energy bills are going up. Consider replacing your heating and cooling equipment as it may have become less efficient. Your heating or cooling system is noisy. You could have an undersized duct system or a problem with the indoor coil of your cooling equipment. Your home is empty for long periods of the day. Have a contractor install an ENERGY STAR certified smart thermostat so you can start saving energy and money while you're away or sleeping. Talk to your local licensed contractor to learn more.