Recommended Home Size ( Sq.Ft.) Note: These combinations require 60 in. of vertical clearance where fan is to be installed.
2 CFM/sqft. Products HERS CFM Watts watt/CFM * HERS Venting
2481 STL Pro 7.0X 4962 773 0.1558 6.93
3048 STL Pro 7.0X + 2.5X 6096 969 0.1590 6.93 + 2.56
3332 STL Pro 7.0X + 3.3X 6663 1083 0.1625 6.93 + 3.13
3850 STL Pro 7.0X + 4.8X 7699 1263 0.1640 6.93 + 4.17
4084 STL Pro 7.0X + 5.5X 8168 1302 0.1594 6.93 + 5.00
4439 STL Pro 7.0X + 6.0X 8878 1370 0.1543 6.93 + 5.37
4962 STL Pro 7.0X + 7.0X 9924 1546 0.1558 6.93 + 6.93