Drop Ceiling Return Air Plenum

Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum.

Drop ceiling return air plenum.

In acoustical applications the area above the insulation may serve as a return air plenum. Can be easily cut to size. Single story building and is fairly well sealed. Dropped ceilings or suspended ceilings are often installed so that the space between them and the floor above or the roof deck can be used as a return air plenum.

25 75 w x 25 75 h 4 1 out of 5 stars 116. Currently moving 2720 cfm on an 8 5 ton rtu. Can accept any size collar up to 18 in. However some drop ceiling designs create a tight seal that does not allow for airflow and therefore may not be considered a plenum air handling.

A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems by providing pathways for either heated conditioned or return airflows usually at greater than atmospheric pressure. Concrete slab ceiling above drop ceiling which is around 20 of store floor space and contacts only one 4 block exterior wall. The space above a ceiling is often used as a return air plenum in many types of commercial buildings meaning exhaust air from the room below is moved from the space through the plenum and then to ductwork leading to the central hvac system. 24 w x 24 h steel return air grilles sidewall and ceiling hvac duct cover white outer dimensions.

Most traditional overhead air distribution systems continue to utilize the ceiling plenum as a return air path. 24 x 24 return filter grille for drop ceiling uses 20 x 20 filter easy access door latch to filter heating vents. The duct board return air box is an r6 the duct board return air box is an r6 insulated box that installs traditionally in a ceiling. Insulation placed on top of a suspended ceiling at a fl oor to ceiling partition helps reduce the transfer of sound over the partition between offi ces.

Flex was used for ra ducts and is not equal area to original return plenum. The air conditioning system supplies heated or cooled conditioned air through ducts in the above ceiling or attic space and this air comes into the room through a device called a register vent or diffuser. One of the design concerns that must be considered and dealt with is noise transfer into the occupied space from either the plenum itself or from adjacent spaces. Insulation installed too close to light fi xtures may affect the luminaire s performance.