438 W/m²·K = 77.1363 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 423 W/m²·K | 74.4947 |
| 428 W/m²·K | 75.3752 |
| 433 W/m²·K | 76.2558 |
| 438 | 77.1363 |
| 443 W/m²·K | 78.0169 |
| 448 W/m²·K | 78.8974 |
| 453 W/m²·K | 79.778 |
438 W/m²·K = 77.1363 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)