HVAC Product Certificates: Matching Scope, Duty & Jurisdiction

Ventilation Fans: Standard, Smoke-Exhaust & Explosion-Proof

Fan compliance depends entirely on the selected duty and should not be merged into one universal claim:

• Standard Ventilation: Pre-delivery checks cover airflow, static pressure, motor current, vibration, and sound power tested under ISO 3744.
• Fire Smoke-Exhaust: YONGFAN source documents for DTF and PYHL-14A identify 280 °C / 30-minute emergency smoke duty referencing Chinese building codes GB 50016, GB 50067, GB 50038.
• Explosion-Protected (Ex): Sources reference GB 3836 for DTF (ExdbIIBT4 / ExdbIICT4), BT35-11, and DFBZ. These references must not be presented as automatic ATEX/IECEx equivalence without the project-specific certificate.

Air Filtration: Efficiency Standards & HEPA Scan Data

Filter documentation follows the filtration stage and test method. Primary and medium filters cite ISO 16890, GB/T 14295, and legacy EN 779 G/F terminology. Legacy grades (e.g. F7, F9) must not be converted to ISO 16890 ePM classes by assumption.

HEPA / ULPA Final Stages: YONGFAN source files confirm that HEPA/ULPA filters undergo 100% individual scan testing for pinhole leakage and frame-seal integrity. A test report for a standard 610×610 mm filter does not automatically cover custom frame depths, non-standard gel seals, or modified airflow velocities unless specified in the test scope.

VAV Terminals (YFVAV-S-T100) & Plenums (YF-MOA)

YONGFAN’s YFVAV-S-T100 single-duct pressure-independent VAV documentation references several distinct compliance areas that must be read according to their true scope:

• ISO 9001: Production quality-management process framework covering fabrication.
• GB 50736: Chinese national HVAC design code governing airflow sizing and comfort criteria.
• GB 4706 Series: Electrical safety standards for integrated electric actuators and DDC controls.
• Reheat Coils: Optional hot-water reheat coils receive hydrostatic pressure testing.

For YF-MOA distribution plenums, the key submittal document is the approved project configuration drawing matching the reflected ceiling plan.

Heat Exchangers, Hydronic Skids & Chemical Treatment

Pressure-bearing and chemical treatment components combine multiple specialized records:

• Heat Exchangers (Plate, U-Tube, Floating Coil): Reference GB 150 / GB 151 with incoming raw material certificates and hydrostatic proof testing at 1.25× design pressure. Do not mislabel as ASME certification.
• Hydronic Booster Skids (JFWZ): Source material states that CE / LVD / EMC documentation is available for European export projects; confirmed per exact skid build.
• Chemical Exhaust (WGP): Source data confirms third-party testing available against GB/T 14294-2008 (unit performance) and GB/T 34012 (purification performance), with UL/SGS fire safety documentation for chemical media.