409 W/m²·K = 72.0291 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 394 W/m²·K | 69.3875 |
| 399 W/m²·K | 70.268 |
| 404 W/m²·K | 71.1486 |
| 409 | 72.0291 |
| 414 W/m²·K | 72.9097 |
| 419 W/m²·K | 73.7902 |
| 424 W/m²·K | 74.6708 |
409 W/m²·K = 72.0291 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)