A mounting curb is recommended for installing your roof exhauster. This 18" high mounting curb is recommended for use in restaurant installations in accordance with NFPA-96. It is constructed of welded, prefabricated, heavy-gauge galvanized steel with a 1.5" wood nailer and includes insulation, damper shelf and mitered 3" cant. The outside dimension of the square curb is 22 1/2".
The 721822V is for use with all SDB, STXD and STXB Size 15-16 roof exhausters including single and triple phase models.