GB 50189-2015 第3.3.2条
| **** | **Envelope thermal performance limits (Severe Cold Zone C)**: Roof K≤0.40 W/(m²·K); exterior wall K≤0.50 W/(m²·K); elevated or cantilevered floor slab in contact with outdoor air at the underside K≤0.50 W/(m²·K); partition wall or floor slab between unconditioned and conditioned spaces K≤1.5 W/(m²·K). |