National standard system framework and hierarchical relationships
The code system involved in hotel MEP design can be divided into three levels: the first level is national standards (GB/GB-T), organized and prepared by the Ministry of Housing and Urban-Rural Development, which are legally binding and whose mandatory provisions must be strictly implemented. The second level is industry standards (JGJ/CJJ), which refine and supplement national standards. The third level is local standards (such as the Shanghai DG/TJ 08 series), which are binding within a specific administrative region and are usually stricter than national standards. As of the end of 2025, there are approximately 36 national standards directly related to hotel MEP engineering, covering five major disciplines: HVAC, electrical, plumbing and drainage, fire protection, and intelligent systems. The citation relationships among codes form a complex network: GB 50016 cites GB 50974, and GB 50974 cites GB 50015; GB 50736 cites GB 50189, and GB 50189 cites GB/T 50878. Important revisions in the 2023 edition of GB 50016 include: the scope of fire elevators is extended to all high-rise hotel buildings; it is clarified that automatic fire extinguishing devices must be installed for kitchen exhaust ducts in hotels; and the MEP configuration standards for refuge floors in super high-rise hotels are raised.
Key points of code implementation in construction drawing review
Construction drawing review is the first gate for code implementation. The review should focus on checking: implementation of mandatory provisions (100% coverage with zero omissions); whether design interface coordination conditions among disciplines are coordinated; whether calculation books are complete and meet code requirements (load calculation, hydraulic calculation, pipe stress calculation, cable ampacity calculation); and the completeness and compliance of the energy-saving design special section and green building special section. Key review points for the HVAC discipline include the cold and heat source system scheme demonstration document, hourly load calculation book, water system balance analysis, and noise reduction and vibration isolation measures. The electrical discipline requires checking the power supply system diagram, load classification table, short-circuit current calculation book, and fire linkage logic description. The plumbing and drainage discipline needs to provide a water consumption calculation table, hot water system heat balance calculation, fire water volume calculation, etc. The most commonly found problem in construction drawing review is inconsistency in design conditions among disciplines—for example, the air-conditioning power distribution capacity in the electrical discipline does not match the unit parameters in the HVAC discipline, resulting in cable selection deviation.
Superimposed requirements of local standards and group standards
Hotel MEP design must simultaneously satisfy the triple superimposed requirements of national standards, local standards, and brand group standards, creating a code layering effect. Taking a Marriott hotel in Shanghai as an example: after superimposing national standards (GB series) + Shanghai local standards (DG/TJ 08 series) + Marriott MIDS standards, the actual design indicators are higher than any single set of standards. Outdoor air volume: GB 50736 requires no less than 30 m3/(h·person), Shanghai DGJ 08-107 requires no less than 35 m3/(h·person), and Marriott MIDS requires no less than 50 m3/(h·room). The upper limit of the three is adopted for design, with a value of 50 m3/(h·room). Chiller energy efficiency: GB 50189 requires COP no less than 5.6, Shanghai requires Grade 1 energy efficiency (COP no less than 6.0), and Marriott MIDS requires COP no less than 6.3. The design value must achieve COP no less than 6.3. Other key superimposed areas include illuminance standards, noise control, hot water delivery time, and backup power duration. It is recommended to prepare a code matrix table at the design kickoff stage, listing the corresponding standards for each design parameter and determining the final value.
International standard systems applicable to overseas projects
Chinese hotel management groups' overseas projects or international hotel projects undertaken by Chinese design institutes need to be familiar with the applicable international standard systems. The most commonly used international standards include: the International Building Code IBC series, the ASHRAE standard system, the British Standard BS series, the European Standard EN series, and ISO standards. In the HVAC field, ASHRAE Standard 62.1 (indoor air quality), Standard 90.1 (building energy efficiency), and Standard 55 (thermal comfort) are most frequently cited. In the electrical field, NFPA 70 (National Electrical Code NEC), NFPA 72 (fire alarm code), and NFPA 20 (stationary fire pump code) are the core basis for North American projects. Overseas projects require special attention to country-specific code differences: Europe focuses on low-carbon energy efficiency (EPBD energy performance directive), the Middle East focuses on drinking water temperature limits (to avoid Legionella), and Southeast Asia focuses on lightning protection grounding and typhoon resistance. It is recommended to hire local design consultants responsible for code compliance review.