309 W/m²·K = 54.4181 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 294 W/m²·K | 51.7764 |
| 299 W/m²·K | 52.657 |
| 304 W/m²·K | 53.5375 |
| 309 | 54.4181 |
| 314 W/m²·K | 55.2986 |
| 319 W/m²·K | 56.1792 |
| 324 W/m²·K | 57.0597 |
309 W/m²·K = 54.4181 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)