Are you using HVAC (Heating Ventilating and Air Conditioning) controls to maximize energy savings?
Are you using HVAC (Heating Ventilating and Air Conditioning) controls to maximize energy savings?
是否采取控制HVAC（暖通空调系统）来最大限度的节能？
Are you using HVAC (Heating Ventilating and Air Conditioning) controls to maximize energy savings?
是否采取控制HVAC（暖通空调系统）来最大限度的节能？