688 W/m²·K = 121.1639 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 673 W/m²·K | 118.5222 |
| 678 W/m²·K | 119.4028 |
| 683 W/m²·K | 120.2833 |
| 688 | 121.1639 |
| 693 W/m²·K | 122.0444 |
| 698 W/m²·K | 122.925 |
| 703 W/m²·K | 123.8055 |
688 W/m²·K = 121.1639 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)