Cross flow fans          ECOFIT cross flow fans are specifically designed for applications within air conditioning, heating, and cooling industries. This leaflet covers fans having an impeller diameter of 80 to 133mm but other sizes are available between 40 to 133mm diameter. You could have discrete speeds by means of series resistance, capacitor, or auto-transformer tappings.    Data sheets             General conditions of use Maximum motor power is reached at maximum air flow rate and zero static pressure. Cross flow fans are suitable for medium air flow rate and low pressureapplications. The main advantage of cross flow fans is their "laminar" or even spread of air across a relatively wide discharge duct. Although the motor ambient temperature must not exceed 40°C, the air transported by the fan may be up to 60°C. 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.