Topical Terminology > Sub-slab Depressurization System (Passive)
1 Definition
Sub-slab Depressurization System (Passive)
For Sub-slab Depressurization System (Passive) we have a term and definition in Air Quality.
Sub-slab Depressurization System (Passive) (Air Quality) 
A system designed to achieve lower sub-slab air pressure relative to indoor air pressure by use of a vent pipe routed through the conditioned space of a building and connecting the sub-slab area with outdoor air, thereby relying solely on the convective flow of air upward in the vent to draw air from beneath the slab.
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