MOUNTING ACCESSORIES Grilles, diffusers and terminal connectors GRA Aluminium grille. Aluminium externally / internally mounted discharge / supply air grilles. Model External Grille dimensions area A B GRA-75 150 x 150 100 x 100 GRA-100 165 x 165 125 x 125 GRA-150 200 x 200 150 x 150 GRA-200 210 x 210 165 x 165 GRA-300 250 x 250 200 x 200 GRI Extract louvre grilles manufactured from aluminium and finished with an epoxy polyester paint coating. Model Available Free outlet nominal dimensions area m 2 H 25 GRI-125 125 x 125 0,007 GRI-200 200 x 200 0,022 30 GRI-250 250 x 250 0,035 24 H-15 24 GRI-300 300 x 300 0,052 H+33 GRI-450 450 x 450 0,121 Recommended air speed Air velocity, pressure drop and sound power V min. V max. Vf (m/s) (m/s) (m/s) 1 1.5 2 3 4 5 6 7 89 10 1,5 3 0.6 0.5 0.4 Determining the airflow rate according 0.3 to the speed Vf (m/s). 0.2 Correction values for LwA1 0.15 Afree (m) 0,01 0,02 0,05 0,1 0,2 0,4 0.1 2 LwA1 (Kf*) -9 -6 -3 - +4 +7 0.08 * Kf = Correction factor 0.06 0.05 0.04 Diagram values refered to Afree = 0,1 m2 0,03 Lwa = Lwa1 + Kf 0,02 200 150 100 80 60 40 30 50 20 45 15 40 10 35 30 5 25 4 3 2 1 1 1.5 2 3 4 5 6 7 89 10 * Afree = Free area Vf (m/s) www.solerpalau.com Mounting accessories 59 LwA1[dB(A)] GRILLE DPt (Pa) Afree* (m2) 8000 450030205010801060103000907000500 300200 Q (m3/h) 5500 400 6500 1000 10000 3500