Made from Thermo-Pan, our headers are the answer to capping off the return air run. Headers come in four popular sizes to fit both standard and I-Joist construction. Precision die cut and scored for easy installation.
Pre-cut and Sorted to fit easily between joists|Specially-sized headers are cut fit I-joist construction
Thermo Thermo-Headers I-Joist Header, Fire Resistant, 16 in Length, 17 in Width