Kootenay Filter Pre-Filter 500SL | Air Filter Replacement Light Meters + PAR Meters Two-Way Control: Gives moisture back

Two-Way Control: Gives moisture back to a container that has dried and takes it in when the air is wet

Read the number the right way and this part is easy

Valve Options: Normally Closed and Normally Open options are available for various sizes

If the probe is contaminated (dirty)

with a 10–100% dimming range for sunrise

Kootenay Filter Pre-Filter 500SL | Air Filter Replacement Light Meters + PAR Meters Two-Way Control: Gives moisture backExtend Filter Life with the Kootenay 500SL Air Filter Replacement Designed for SL500 filters without a flange, the Kootenay Filter Pre Filter 500SL blocks dust, debris, and larger particulates from reaching and clogging your primary filter. This replacement pre filter enhances air filtration efficiency, supports odor control, and reduces system maintenance over time. With a 16'' diameter, 20'' length, and compatibility with 6'', 8'', and 10'' flanges,