How an Encapsulation Dehumidifier Keeps a Sealed Crawl Space Dry

How an Encapsulation Dehumidifier Works: how it works and when it's the right call.

Once a crawl space has been sealed with a liner and its vents have been closed, the space still holds some residual humidity from the soil, the framing, and the air trapped inside during installation. The dehumidifier pulls moisture out of that sealed air and sends it to the sealed sump pit or through a condensate line to a discharge point outside the crawl space, so there is no reservoir to empty. Epp Foundation Repair sizes the unit to the sealed volume and moisture load of the specific crawl space, since an undersized unit will run around the clock without keeping up. The dehumidifier only works as intended once the liner and vent sealing are in place. Installing one in an open, vented crawl space means it is drying air that the vents replace as fast as it is dried, which is a losing effort in the summer months across the Midwest. That is why Epp Foundation Repair treats the dehumidifier as the final piece of a complete crawl space encapsulation system rather than a stand-alone fix for a humid crawl space.