21.5 W/m²·K = 3.7864 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 15.5 W/m²·K | 2.7297 |
| 17.5 W/m²·K | 3.0819 |
| 19.5 W/m²·K | 3.4342 |
| 21.5 | 3.7864 |
| 23.5 W/m²·K | 4.1386 |
| 25.5 W/m²·K | 4.4908 |
| 27.5 W/m²·K | 4.843 |
21.5 W/m²·K = 3.7864 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)