The data center has a dedicated heating, ventilation, and air conditioning (HVAC) system, so the temperature is always a cool 70 degrees Fahrenheit.

数据中心有专用的取暖、通风和空调(Heating, Ventilation, and Air Conditioning, HVAC)系统，因此温度始终是华氏70度。

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Replacing an outdated HVAC system with a more energy-efficient one can lower your monthly energy bills.

用新的节能空调系统来替换过时的可以减少你每月的能源支出。

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The principal component analysis (PCA) approach for sensor fault detection, identification and reconstruction in HVAC system is presented.

提出了空调系统传感器故障检测、故障识别、故障重构的主成分分析方法。

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The result was pretty astonishing they were able to save between 30-70% of energy in their HVAC system.

FORBES: A Flying Robot Plays Catch and Holds the Key For Efficient HVAC Systems

The contaminated HVAC system covers only the southeast quadrant of the building -- about 13 Senate offices.

CNN: Fumigation largely succeeding in clearing anthrax

Improvements include retrofits to 1, 500 lighting fixtures, a 200-kilowatt rooftop PV array, and an overhaul of the HVAC system.

FORBES: San Francisco Announces Biggest Commercial Clean Energy PACE Retrofit