Building energy efficiency testing is a crucial process that ensures construction projects meet national energy conservation standards. This evaluation involves a series of measurements and assessments to confirm whether the building's systems are operating efficiently and sustainably. According to the GB 50411-2007 standard, "Building Energy Conservation Engineering Construction Quality Acceptance Specification," several key parameters are tested, including indoor temperature, hydraulic balance of the heating system’s outdoor pipeline network, water supply rate, heat transfer efficiency, air volume at each air outlet, total ventilation volume, air conditioning system airflow, water flow rate of the air conditioning unit, total flow of hot and cold water in the system, cooling water flow, average illuminance, and lighting power density. These tests help identify areas where energy can be saved and performance improved. For public buildings, energy-saving testing follows the JGJ/T 177-2009 standard, "Public Building Energy-Saving Testing Standards." This includes evaluating the average indoor temperature and humidity, the heat transfer coefficient of non-transparent exterior structures, the actual performance coefficient of cold water (heat pump) units, water system return temperature consistency, supply and return water temperature difference, pump efficiency, energy efficiency coefficient of the cooling source system, fan unit air volume power consumption, fresh air volume, constant air volume system balance, and outdoor temperature at the heat source (such as a dispatch center or heat station). These metrics provide a comprehensive overview of the building's energy usage and efficiency. In residential buildings, energy-saving testing is guided by the JGJ132-2009 standard, "Energy-saving Testing Standards for Residential Buildings." Key factors assessed include indoor average temperature, the heat transfer coefficient of main enclosure parts, internal surface temperature of thermal bridges, thermal defects in external protective structures, insulation structure performance, hydraulic balance of the outdoor pipe network, water supply rate, heat loss rate of the outdoor pipeline network, boiler operation efficiency, and power consumption ratio. These tests ensure that residential buildings are not only comfortable but also energy-efficient and environmentally friendly. Hard Seal Sphere Seat Assembly Hard Seal Sphere Seat Assembly,Hard Sealed Seat,Hard Sealed Fixed Sphere,Hard Sealed Regulating Sphere Antong Valve Co.,Ltd , https://www.atvalveball.com