Exhaust Fan Roof Curb- 23″ square x 20″ high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (23 square). Designed to properly support the weight of the exhaust fan for roof mounted applications. For use with fans that have a 24.75 square base. Compatible with fan models DU85HFA, DR-85HFA, NCA14FA. Minimal field installation is required. Constructed of 18 gauge galvanized steel. Pitched curbs available upon request.

Exhaust Fan Roof Curb- 19.5″ square x 20″ high, 18 gauge galvanized steel construction, vented bolt together flat roof curb (19.5 square). Designed to properly support the weight of the exhaust fan for roof mounted applications. For use with fans that have a 21 square base. Compatible with fan models DU33HFA, DU50HFA, DR-33HFA, DR-50HFA. Minimal field installation is required. Constructed of 18 gauge galvanized steel. Pitched curbs available upon request.