509 W/m²·K = 89.6401 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 494 W/m²·K | 86.9985 |
| 499 W/m²·K | 87.879 |
| 504 W/m²·K | 88.7596 |
| 509 | 89.6401 |
| 514 W/m²·K | 90.5207 |
| 519 W/m²·K | 91.4012 |
| 524 W/m²·K | 92.2818 |
509 W/m²·K = 89.6401 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)