| 2019 Code QuietCool WHF Specs - For Specified Fan + HERS Option | Recommended Home Size ( Sq.Ft.) | |||||
| Product Info | HERS CFM | Watts | watt/CFM | *HERS Venting | 2 CFM/sqft. | 3 CFM/sqft |
| STL Pro 2.5X | 1134 | 196 | 0.17 | 2.56 | 567 | 378 |
| STL Pro 3.3X | 1701 | 310 | 0.18 | 3.13 | 851 | 567 |
| STL Pro 4.8X | 2737 | 490 | 0.18 | 4.17 | 1369 | 912 |
| STL Pro 5.5X | 3206 | 529 | 0.17 | 5.00 | 1603 | 1069 |
| STL Pro 6.0X | 3916 | 597 | 0.15 | 5.37 | 1958 | 1305 |
| STL Pro 6.5X ** | 3936 | 571 | 0.15 | 5.82 | 1968 | 1312 |
| STL Pro 3.3X + 3.3X | 3402 | 620 | 0.18 | 6.26 | 1701 | 1134 |
| STL Pro 6.0X + 2.5X | 5050 | 793 | 0.16 | 5.37 + 2.56 | 2525 | 1683 |
| STL Pro 6.0X + 3.3X | 5617 | 907 | 0.16 | 5.37 + 3.13 | 2809 | 1872 |
| STL Pro 6.0X + 4.8X | 6653 | 1087 | 0.16 | 5.37 + 4.17 | 3327 | 2218 |
| STL Pro 6.0X + 5.5X | 7122 | 1126 | 0.16 | 5.37 + 5.00 | 3561 | 2374 |
| STL Pro 6.0X + 6.0X | 7832 | 1194 | 0.15 | 5.37 + 5.37 | 3916 | 2611 |
| STL Pro 6.0X + 6.0X + 2.5X | 8966 | 1390 | 0.16 | 5.37 + 5.37 + 2.56 | 4483 | 2989 |
| STL Pro 6.0X + 6.0X + 3.3X | 9533 | 1504 | 0.16 | 5.37 + 5.37 + 3.13 | 4767 | 3178 |