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Technical conditions for insulating glass (Ministry of Industry and Information Technology of the People’s Republic of China 2015).
| Types | Levels | Technical conditions | ||
|---|---|---|---|---|
| K(W/m2·K) | LSG | GIR | ||
| Thermal insulation type BW | BW1 | ≤1.8 | ≥1.0 | — |
| BW2 | ≤1.5 | ≥1.0 | — | |
| BW3 | ≤1.0 | ≥1.0 | — | |
| thermal insulation type GR | GR1 | ≤2.5 | ≥1.0 | ≤0.40 |
| GR2 | ≤2.2 | ≥1.5 | ≤0.20 | |
| GR3 | ≤2.0 | ≥1.9 | ≤0.05 | |
| thermal insulation type BG | BG1 | ≤2.0 | ≥1.0 | ≤0.40 |
| BG2 | ≤1.8 | ≥1.5 | ≤0.20 | |
| BG3 | ≤1.5 | ≥1.9 | ≤0.05 | |
