Energy Efficient Air Conditioning Systems

Energy Star Label

• The easiest way to spot energy-efficient air conditioning systems is by locating the Energy Star label. Each product is assigned a score based on specific criteria. The energy-efficiency ratio, or EER, is measured along with the seasonal energy efficiency ratio, or SEER. The EER measures the ratio of cooling capacity to input power, while the SEER measures the effectiveness of a product throughout the entire season. If it meets minimum qualifications, the product is given an Energy Star label.

Central Air Conditioners

• Central air conditioners cost more initially but, if installed and maintained properly, are cheaper over time. An essential part of any central air conditioner is the blower motor that moves cooled air through duct work. However, this part is usually located in a furnace, not the air-conditioning unit itself. To ensure energy efficiency, install a new furnace along with the new central air conditioner. The standard increase in efficiency is approximately 15 percent, but will not be achieved with an out-of-date furnace.

Room Air Conditioners

• Room air-conditioning systems are usually known as window-box units and Energy Star ratings of 10 or above are suggested. Proper sizing relative to the room is essential for energy efficiency. If the unit is too large for the room it produces uneven cooling and excessive cycling from on to off. However, smaller units are more efficient due to longer cycles and greater dehumidification abilities. Additional features, such as temperature-control timers, increase efficiency.

Maintenance

• Just because an air-conditioning system has energy-efficient specifications doesn't mean it's energy efficient. Regular maintenance is required to keep the unit running at top performance. Make sure your air conditioner is installed correctly. Tighten all electrical connections to increase efficiency and avoid damage to components. Lubricate necessary parts to eliminate friction. Clear the condensate drain of any blockage. In addition, clean cooling coils and blower components as needed, and keep refrigerant amounts level.