These purpose designed return air filter boxes are designed to fit the DaikIn above ceiling ducted unit air conditioning fan coil units.
Plenums are supplied with two filter installation frames that screws to the back of the unit. This allows removal of the filter by both side withdrawal or by quick release of the plenum box.
Note that removal of the air inlet spigot on the fan coil is required to complete the installation and the overall length of the two filter frames is 20mm more than the unit.
