![Plenum trusses hide HVAC: These modified trusses have a recessed area above the bottom cord, which provides a space to hide HVAC equipment and ductwork. To keep the plenum area within the conditioned enclosure, the space must have an uninterrupted air barrier and be insulated to an R-value that matches the rest of the ceiling.](https://images.greenbuildingadvisor.com/app/uploads/2025/02/07093334/H330AX-thumb-16x9.jpg)
HVAC for a Slab-on-Grade House
Plenum trusses are a solution for running the ducts for a ducted minisplit in a house with no crawlspace or basement and an unconditioned attic
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