Titan Controls Mercury 3 -- 3 Day/Night Fan Speed Controller 401 to 600 CFM This high-flow head answers both

This high-flow head answers both

16" spacing helps standardize layouts for benches and container rows

It fits herbs

streamlining manifold layout and saving time on install and maintenance

featuring a sleek black galvanized steel construction

Titan Controls Mercury 3 -- 3 Day/Night Fan Speed Controller 401 to 600 CFM This high-flow head answers bothAutomatically increases or decreases fan speed based on controller set points. Allows user to adjust deadband range to meet garden requirements. Temperature control range is 55 F to 95 F. 6 ft temperature probe is accurate to within 2 F. Enclosure protects internal components from dust, rust, and moisture. 6 Amps maximum 120 V 60 Hz.