T/UNP 704-2025 Technical Specifications for HVAC Installation in Buildings

Scope

Main technical content: This standard specifies the general requirements, preliminary preparations, installation processes, and acceptance requirements for the installation of HVAC systems in buildings, including air conditioning system debugging, ground radiant heating and cooling installation, air handling system installation, gypsum radiant panel installation, and air conditioning system installation. For example, in the debugging of air conditioning systems, the power voltage fluctuation range of electrical equipment should be within ±10%, and the wiring should meet the rated current requirements. When installing ground radiant heating and cooling systems, the insulation layer should be laid flat and tightly, and the installation spacing of heating pipes should not exceed 10mm. The water pressure test pressure is 0.6MPa. The total resistance of air handling system pipes should be within 150Pa. The outdoor air hood material should be corrosion-resistant. For the installation of gypsum radiant panels, light steel keel should be used, and special tools are required for pipe connection. When installing air conditioning systems, the slope of the condensate water pipe should not be less than 1%, and the valves should be installed for easy operation. This standard is applicable to the installation and acceptance of HVAC systems in buildings, helping to standardize the installation process and ensure the safety and performance of the system.

Development Information

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