Backward FAN
	Fan Size	Max Air Flow at Best Efficincy (CFM)	Static Pressure Range (in.w.g)	Sound Level (dB)	Fan Weight (kg)
	250	5000	0.5-7	55-80	31
	280	6000	0.5-7	60-85	39
	315	6500	0.5-7	60-85	45
	355	7500	0.5-7	60-85	56
	400	10000	0.5-7	60-85	75
	450	12000	0.5-7	60-85	89
	500	16000	0.5-7	60-85	112
	560	20000	0.5-7	65-90	157
	630	27000	0.5-7	65-90	187
	710	30000	0.5-7	65-90	227
	800	42000	0.5-7	65-90	292
	900	51000	0.5-7	65-95	366
	1000	70000	0.5-7	65-95	419