Floor Plenum Design

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Floor plenum design.

Within the underfloor plenum it is always desirable to the extent possible to have the supply air flow freely to the supply outlets. The number of plenum inlet locations is a function of the size of control zones access points available in the building amount of distribution ductwork used under the floor and other design issues. During the pre design phase the contents and their impact should be conceptually identified. The following list of questions is a good place to start in this process.

The source of heat is the downflow or counterflow warm air furnace commonly used to force air into under slab ductwork. Plenum contents can have a major impact on the raised floor plenum performance. Plenums are air compartments or chambers that are sometimes found in buildings either above suspended ceilings in the gap between the ceiling and the floor slab or below raised floors in the gap between the raised floor and the floor slab. It is important that conditioned air in a floor plenum flows into the occupied zone and does not leak into cavities risers stairwells heating trenches or other adjacent zones.

Airfixture s underfloor air distribution system takes advantage of pressurized underfloor plenum spaces to provide air conditioning heating and ventilation. The basic arrangement in a plenum floor is that the floor is supported above the slab to leave space below for the heating plenum and utilities. Plenum space air conditioning heating and ventilation.