Manufactured in High Quality aluminium extrusion profiles Designed with Nylon Bushes for efficient, smooth and quiet operation & to avoid rattling noise. Aerofoil shaped blades Deflection blades are adjustable manually and individually Standard 20mm blade spacing Single/Double deflection with high Quality anodising or powder coating. With or Without Opposed blade Dampers Available in different Standard sizes Non standard sizes also manufactured upon request. Technical Data ( Tested by ETL Semko - USA ) Standard Size mm/inch Area factor Ak NeckArea (sq.ft) Neck Velocity (fpm) 200 250 300 350 400 500 600 700 800 Velocity Pressure (in w.g) .003 .004 .006 .008 .010 .016 .023 .031 .040 150X150 6X6 Ak= 0.118 0.242 CFM Pt (in w.g.) Throw (ft.) NC 48 0.010 3-6 <15 60 0.015 4-7 <15 72 0.022 5-8 <15 84 0.030 6-10 <15 96 0.039 7-11 15 120 0.061 8-12 18 144 0.088 9-13 21 168 0.120 10-15 26 192 0.156 11-16 30 CFM Pt(in w.g.) Throw (ft.) NC 109 0.012 5-9 <15 136 0.018 6-10 <15 164 0.026 7-11 <15 191 0.035 8-13 15 218 0.046 9-14 17 273 0.072 11-15 23 327 0.104 12-17 27 382 0.141 14-18 30 436 0.184 15-19 35 CFM Pt(in w.g.) Throw (ft.) NC 194 0.013 7-10 <15 242 0.021 8-11 <15 291 0.030 9-12 <15 339 0.041 10-14 16 388 0.053 11-16 20 485 0.083 13-18 27 581 0.120 14-19 31 678 0.163 15-20 34 775 0.212 16-21 38 CFM Pt(in w.g.) Throw (ft.) NC 302 0.014 9-12 <15 378 0.022 10-13 <15 453 0.032 11-14 15 529 0.043 12-16 18 604 0.056 13-18 23 755 0.088 15-20 31 906 0.127 16-22 35 1057 0.172 17-23 39 1208 0.225 18-24 42 CFM Pt(in w.g.) Throw (ft.) NC 436 0.015 11-14 <15 545 0.023 12-15 <15 654 0.033 13-16 17 763 0.046 15-19 21 872 0.060 16-21 26 1090 0.093 18-23 32 1308 0.134 19-24 36 1526 0.182 20-25 40 1744 0.238 21-27 44 225X225 9X9 Ak= 0.231 0.545 300X300 12X12 Ak= 0.407 0.969 375X375 15X15 Ak= 0.590 1.51 450X450 18X18 Ak= 0.838 2.18

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