680 W/m²·K = 119.755 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 665 W/m²·K | 117.1133 |
| 670 W/m²·K | 117.9939 |
| 675 W/m²·K | 118.8744 |
| 680 | 119.755 |
| 685 W/m²·K | 120.6355 |
| 690 W/m²·K | 121.5161 |
| 695 W/m²·K | 122.3966 |
680 W/m²·K = 119.755 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)