HVAC Standards Comparison
Side-by-side comparison of the three major international HVAC design standards: ASHRAE (US/International), GB 50736 (China), and SHASE (Japan). Understand the key differences in design outdoor temperatures, insulation classifications, safety factors, and calculation methodologies for heating load, cooling load, duct sizing, and radiator sizing.
Heating Load: ASHRAE vs GB vs SHASE
Compare design outdoor temperatures, indoor setpoints, infiltration models (0.35 ACH vs 0.5 h⁻¹ vs C-value), orientation corrections, and safety margins across the three standards. See which standard gives the most conservative result.
Cooling Load: ASHRAE vs GB vs SHASE
Compare unit-index cooling load approaches: ASHRAE's CLTD/CLF method, GB 50736's simplified index (80-160 W/m²), and SHASE-S 112's heat load per unit floor area (60-160 W/m²).
Duct Sizing: ASHRAE vs GB vs SHASE
Comparison of duct velocity limits, friction rate targets, aspect ratio guidelines, and material specifications per ASHRAE/SMACNA, GB 50736, and SHASE-S 010.
Radiator Sizing: EN 442 vs GB/T 13754
Compare the European EN 442 standard (ΔT50 nominal output, exponent-based correction) with China's GB/T 13754 (standard conditions at 95/70°C and 130/70°C). Real-world correction factor comparison.