Space Cooling » Unitary (DX) Air-conditioners

Savings

Improvements in component technologies and usage lead to energy savings in DX air conditioners. Advancements such as inverter driven compressor, improvements in heat exchangers, dehumidification etc. lead to energy savings from 3% to 50% individually and 30 to 50% if taken together.

Energy savings due to component technology improvements in DX Air conditioners

Energy savings

Summary of savings measures for room air conditioners and packaged products

Measure	Comments	Indicative savings range (%)
Compressor	Inverter control, matching speed to cooling demand	30% (up to 50% in some applications)
	DC drive motor; better compressor	Up to 15%
Dedicated dehumidifier	Use dedicated dehumidifier or two stage compressors	20-40% depending upon the humidity levels
Improved heat exchangers	Larger/improved condenser and evaporator	Up to 25%
Improved expansion valve	Electronically controlled	9%
	Thermostatically controlled	5%
Variable speed inverter driven fans	For evaporator and condenser fans	4%
Reduced standby (electronics)	Savings are higher in temperate climates (less usage) and for smaller units	3% for average systems
Reduced standby (crank case heater)	Only applicable in 10% of units for cold weather usage (often reversible units). Savings higher % for temperate climates (less usage)	Some units: Up to 50% in cold weather climates

(ARMINES et al., 2009b) See respective technical sections

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Space Cooling » Unitary (DX) Air-conditioners

Savings

Summary of savings measures for room air conditioners and packaged products

Select an Option

Select available Technology

We recommend reading our essential documents on buildings:

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Buildings Guide

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Space Cooling » Unitary (DX) Air-conditioners

Savings

Summary of savings measures for room air conditioners and packaged products

Select an Option

Select available Technology

We recommend reading our essential documents on buildings: