Drop Ceiling Return Air Plenum

Used as a central return vent box filter grill not included.

Drop ceiling return air plenum.

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. 24 x 24 return filter grille for drop ceiling uses 20 x 20 filter easy access door latch to filter heating vents. This is most common in commercial buildings schools hospitals or libraries. 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.

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. 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. Flex was used for ra ducts and is not equal area to original return plenum.

Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum. 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. 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. Concrete slab ceiling above drop ceiling which is around 20 of store floor space and contacts only one 4 block exterior wall.

In acoustical applications the area above the insulation may serve as a return air plenum. Can be easily cut to size. 25 75 w x 25 75 h 4 1 out of 5 stars 116. Single story building and is fairly well sealed.

Product is knocked down for shipping and must be assembled. Can accept any size collar up to 18 in. Currently moving 2720 cfm on an 8 5 ton rtu. Insulation installed too close to light fi xtures may affect the luminaire s performance.