Energy Efficiency Ratio Of 5 Star Ac

Pledge to choose an energy star certified room air conditioner.

Energy efficiency ratio of 5 star ac.

For air conditioners the measure of energy efficiency in determining whether the air conditioner meets the minimum energy performance standard is the energy efficiency ratio eer for cooling and the coefficient of performance cop for heating. When buying a new room air conditioner look for the energy star label. The central air conditioner also needs a blower motor which is usually part of the furnace to blow the cool air through the duct system. Most air conditioners are rated in british thermal units btu.

For example a 4 star window air conditioner will not have the same efficiency as a 4 star split air conditioner. Most manufacturers are reducing their window acs line ups and focusing more on split acs many of which are inverter based. The manner in which they function leads to better energy efficiency compared to non inverter models. These ratings are posted on an energy guide label which must be attached in a visible place on all new air conditioners.

A room air conditioner s efficiency is rated according to the energy efficiency ratio eer. If all room air conditioners sold in the united states were energy star certified the cost savings would grow to more than 350 million each year preventing more than 6 billion pounds of greenhouse gas emissions annually equivalent to the emissions from over 570 000 vehicles. The ratio is measured in british thermal units btu per hour. The higher the eer rating the more efficient the air conditioner.

Why you should pay attention to eer and seer. A similar standard is the european seasonal energy efficiency ratio eseer. For room air conditioners this rating is the energy efficiency ratio or eer for central air conditioners this rating is the seasonal energy efficiency ratio or seer. A room air conditioner s efficiency is measured by the energy efficiency ratio eer.

This is the ratio of cooling capacity to the power input or how well it cools compared to how much energy it needs. The star rating for air conditioners is determined differently to other appliances. One btu is the amount of heat it takes to raise the temperature of one pound of water by 1 fahrenheit about 1055 joules. The eer is the ratio of the cooling capacity in british thermal units btu per hour to the power input in watts.

The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio seer which is defined by the air conditioning heating and refrigeration institute in its 2008 standard ahri 210 240 performance rating of unitary air conditioning and air source heat pump equipment. Energy star certified central air conditioners have higher seasonal energy efficiency ratio seer and energy efficiency ratio eer ratings and use 8 percent less energy than conventional new models. The higher the eer the more efficient the unit.