Fixed blade swirl diffuser with perforated plate, KOOLAIR, model DFRE-Q-PR, size _, plate dimension of _x_. Finished in any RAL colour upon request.
Incorporates side conection plenum box made in galvanised steel sheet, with volume control damper on the spigot. Made in steel sheet. Recomended instalation height between 2,5 and 3,5 m.