621 W/m²·K = 109.3645 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 606 W/m²·K | 106.7228 |
| 611 W/m²·K | 107.6034 |
| 616 W/m²·K | 108.4839 |
| 621 | 109.3645 |
| 626 W/m²·K | 110.245 |
| 631 W/m²·K | 111.1256 |
| 636 W/m²·K | 112.0061 |
621 W/m²·K = 109.3645 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)