A drives programme dedicated to ventilation solutions

OJ Electronics have more than 50 years of experience in the HVAC business and have developed drives for the ventilation segment for more than 20 years. The combination of our high product quality and our extensive  ventilation application know-how have resulted in dependable drives.

The OJ Drives® programme contains a range of drive products for different ventilation applications, including air handling units, rooftop fans, plug fans, box fans and rotary heat exchangers.

The new alternative for rotary heat exchangers

The DRHX is the next generation drive for rotary heat exchangers – based on all-new technology. The DRHX series covers the range from 2Nm to 14Nm with both modbus and analogue control. You can even get a version with a 3x7-segment display.

OJ DV product range - built to meet your ventilation needs

Our range of OJ DV drives comprises 13 output variants (from 0.5 to 15 kW) fitted inside five different housings to match any rooftop fan, plug fan, or AHU application.



Knowledgeable dialogue and close cooperation is the shortest route to a perfect solution.








All-new technology

for Rotary Heat Exchangers

The next generation drive for rotary heat exchangers is here. It is based on all-new technology including a sensorless rotation monitor.

Product range

for Rotary Heat Exchangers

Get access to technical information on our series of DRHX drives dedicated to rotary heat exchangers.



performance for OJ DV

Continuous operation from -40° to    + 50°. In Fire Mode, the OJ DV drives can run for one hour at 70°.


Product range

For Fan applications

Click here to view technical information on the series of DV drives dedicated for ventilation systems.