Breathable Wall 36 inch x 36 inch: w/Flush Mount Frame Controller Accessories replace both together

replace both together

and the 4 L sits at half of that

Hydrogen sulfide: Cuts the rotten-egg odor that plagues many well and spring-water sources

Unit weight: 90 Lbs

Breathable Wall 36 inch x 36 inch: w/Flush Mount Frame Controller Accessories replace both togetherRigid Breathable Blackout Material, You can Build with! What is a breathable wall? Used in indoor grow rooms and greenhouse for Light Deprivation, the Breathable Wall is rigid product that allows zero light to pass throught ventilation holes (exhaust and intake) while allowing full air flow. (a) a simple opening is needed in an exterior wall, OR a shared wall between two grow rooms spaces (D) The Breathable Wall can also be installed directly to the