18 x 18 & 24 x 24 Grate & Frame

Features:

– Total Open Area: 174.4 sq. in.

– Frame Size: 19.5″ x 19.5″.

– Floor Flow Rate: 788 GPM @ 1.09 ft/sec.

– Wall Flow Rate: N/A.

– Flow Rate @ 1.5 ft/sec: 812 GPM.