GB 50189-2015 第3.3.1条
| **** | **Envelope thermal performance limits (Severe Cold Zone A/B)**: Roof heat transfer coefficient K ≤ 0.35 W/(m²·K); exterior walls (including opaque curtain walls) K ≤ 0.43 W/(m²·K); elevated or cantilevered floor slabs with undersides exposed to outdoor air K ≤ 0.43 W/(m²·K); partition walls or floor slabs between unconditioned and conditioned spaces K ≤ 1.5 W/(m²·K). |