Axial fans          The range presented in this chapter consists of axial fans (VRE), with grill (VGR) or basket grill (VPR), round (VGV) or square (VGC) rings, and threephase motor (VREt, VGRt, VPRt, VGVt, VGCt). In response to your specific needs, the air flow, power, rotational speeds (multispeed by windings or by controllers), noise level, overall dimensions and finish... of the fans can be specifically defined according to your requirements.    Data sheets             General conditions of use Maximum motor power is reached at maximum static pressure and zero air flow. Axial fans must not be used close to air cut-off or close to their "stall" point. Axial fans are designed for high air flow rate at low pressure. Any modification to the ECOFIT standard assembly or wall plate design will affect performance. ECOFIT motors are speed controllable by voltage variation, but where electronic controllers are used they must be designed for electric motor duty and be compatible with ECOFIT products. Capacitors must be of the "motor run" type and be of the recommended value, voltage rating, and life expectancy. The purchaser must test for motor total temperature in the application, with the worst operating conditions for the motor. ECOFIT should then validate the test results.