Ebm-papst says it has developed a new EC fan line that ensures efficient, economical, and quiet operation. The size 500 axial fans from ebm-papst were specially engineered for use in outdoor heat pumps and have now been optimized for energy efficiency and noise reduction. The ready-to-connect plug and play unit consists of the new, patented fan housing system with an integrated diffuser, motor, electronics and HyBlade® impeller. With its pressure-raising effect, the diffuser integrated in the fan housing lowers outlet losses significantly, allowing an air performance increase of up to 10% while reducing noise by up to 3 dB(A). For the entire fan system, this adds up to 23% more efficiency than conventional solutions, according to the company.

The GreenTech EC motors can also be controlled via their serial RS485 MODBUS RTU interfaces or 0-10 V DC control inputs, enabling high efficiency even in partial-load operation. The fans can run at lower speeds at night, for example. This is especially important for heat pumps used in residential buildings where sound emission must be kept as low as possible. The new axial fans will be available in summer 2016.