The following technical features help room air conditioners achieve better energy efficiency:

• High-efficiency compressors - Advanced compressors draw in more heat from the air when cooling a room, so they need less energy to operate.
• Filter reminder - ENERGY STAR certified units will help you remember when it is time to check/clean the filter. This will help keep your unit operating efficiently.
• High-efficiency fan motors - These motors use less energy to circulate the air and produce less noise. ENERGY STAR units also limit fan operation when the compressor is turned off through an Energy Saver Mode.
• Timers - Timers offer better temperature control so ENERGY STAR certified units run only when needed.
• Improved heat transfer surfaces and insulation - ENERGY STAR certified models transfer more heat from the air into the coils than conventional models, saving the energy required to compress the refrigerant.