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There are many different kinds of heating and cooling systems you can use in
your house in Louisville, KY.

Central Air Conditioners. Since January 2006, all residential air conditioners in Louisville, KY sold in the United States must have a SEER of at least 13. ENERGY STAR qualified central air conditioners must have a SEER of at least 14. By upgrading from SEER 9 to SEER 14, you can reduce your energy consumption by more than 35%. If you are paying $100 per month in direct cooling costs, you could reduce your monthly utility bill by up to $35 by switching to the SEER 14 rated air conditioning system.

Room Air Conditioners. When buying a new room air conditioner, look for units with EER of 10 or higher. The ENERGY STAR website, found in Further Reading, carries additional specifications.

Air Source Heat Pumps. Air source heat pumps combine heating and cooling capabilities. Look for ENERGY STAR qualified heat pumps with a SEER of 14 or greater. Also consider how efficiently the heat pump is during colder times of the year. The Heating Seasonal Performance Factor (HSPF) is
the ratio of the total heat output of a heat pump during the normal heating season divided by the total
energy consumed during that period. ENERGY STAR qualified heat pumps have a HSPF of eight or
greater.

Furnaces. Furnaces use fuel (natural gas and oil) to create heat. The Annual Fuel Utilization Efficiency (AFUE) measures the amount of heat actually delivered to your house compared to the amount of fuel supplied to the furnace. The higher the AFUE number, the more efficient the system. To earn the ENERGY STAR label, oil and gas furnaces must have an AFUE of 85% and 90%, respectively, or greater.