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APR Users

Installing an APR Control on Your System

Rawal Devices only manufactures and sells the APR Control & APR-E Valve. We do not provide any other materials that will be needed for the installation. Read More

APR Control for Ventilation & Fresh Air

The introduction of outside air with highly variable load creates the need for variable-capacity systems. APR Control enables the system to match capacity with changing load conditions. Read More

APR control energy efficiency

The APR Control provides alternative design strategies that have been proven to reduce total power consumption of a new or existing system installation/design. Read More

APR Control Selection Criteria

We are pleased to assist both new and long-term customers with selection of the best APR Control model (percentage of modulation) for their particular application. Read More

Nodaway School District

School district retrofits unit ventilators with APR Controls. Previously, lowering fan speed to mitigate noise complaints led to multiple problems including significant water damage as a result of frozen (seasonal) hot water heating coils. Read More

Angiotech Electronic Valve

Pennsylvania pharmaceutical specialty and medical device manufacturer uses Rawal APR Control to control humidity levels in cleanrooms and avoid bacterial growth and medical equipment damage. Read More

ASHRAE Cleanroom Research Project

ASHRAE approved research project to test and demonstrate the use of new technologies in controlled environments. The Electronic APR Control was installed to provide precise discharge air control to maintain the tight temperature tolerances of the room. Read More

Indoor Agriculture Cannabis Farm

Cannabis ‘Grow’ facilities account for one of the fastest sectors of growth ever in HVAC! Having a properly designed HVAC system to control the exacting conditions of grow rooms is critical to increasing plant yield per week and potentially up to 1/3 more crop per harvest season. Read More