YD/T 2435.4-2020 Technical Guidelines for Energy Saving of Telecom Power Supply and Computer Room Environment Part 4: Air Conditioning Energy Efficiency Classification (English Version)
2020YD/T 2435.4-2020 Technical Guidelines for Energy Saving of Telecom Power Supply and Computer Room Environment Part 4: Air Conditioning Energy Efficiency Classification
2012YD/T 2435.4-2012 Guide for energy saving technology of power supply and Room environment for telecommunications.Part 4: Grade of energy efficiency of Air-conditioners