221 W/m²·K = 38.9204 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 206 W/m²·K | 36.2787 |
| 211 W/m²·K | 37.1593 |
| 216 W/m²·K | 38.0398 |
| 221 | 38.9204 |
| 226 W/m²·K | 39.8009 |
| 231 W/m²·K | 40.6815 |
| 236 W/m²·K | 41.562 |
221 W/m²·K = 38.9204 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)