Creating Variable Capacity DX Systems

Improving System Performance

Easily add APR Control to new or existing air conditioning

Match cooling capacity to ever changing load conditions

Eliminate humidity associated with oversized systems

Prevents evaporator coil icing, etc.Protect systems and save $ on warranty call backsMinimize humidity from short cycling

The APR Control: The Service Solution

HVAC Engineers: Simplify Unit Design & Selection

APR Control makes any system Variable Capacity

Match capacity to ever-changing load conditions with 80% plus turndown

New or Retrofit Projects/Factory or Field Installed

Value Engineering advantage that doesn’t sacrifice unit performance!

Why Choose Rawal APR Control?

All Air Conditioners are oversized! Oversizing is a necessary evil on DX systems.                                                                                                                                                       

The APR Control makes any standard A/C Direct Expansion unit a variable-capacity system — extending its cycle of operation and continuously matching capacity to changing load conditions.

  • FREE & EXTENSIVE SUPPORT

    For new applications and systems, we offer in-depth consultation and solution assistance at planning and design stage

    Over 25 years of successful solutions in a wide range of DX A/C applications up to nominal 100 tons

  • SERVICE / RETROFIT, RATHER THAN REPLACE!

    In service scenarios, we can assist you finding solutions using the APR Control with existing equipment and controls  – APR Control offers more reliable compressor life – accepted by major OEM manufacturers.

  • ENGINEERING ASSISTANCE

    We invest in your success – our goal is to build trust, not dependence on costly replacements! Our 50+ years of experience will help with unit selection and system design, enabling you to achieve innovative HVAC solutions.



Rawal APR Control

Education & Resources

Our experienced team is available to assist with your inquiries about installation, design, & servicing systems with the APR Control.

Learn More

Trusted & Used by Major Manufacturers

Major U.S. OEMs offer the APR Control as a factory-installed modification, or for field installation on their systems requiring retrofit upgrades/service.

Select Distribution

Our team can seamlessly help you choose an APR Control suitable for your system and direct you to a local authorized distributor

Please Give Us A Call

All Air Conditioners Are Oversized!

The Unavoidable Design Flaw

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Most AC systems are oversized and often fail temperature and humidity control demands. This oversizing is a necessary evil to absolutely ensure basic cooling demands are met. But the tendency of oversizing leads to short cycling – a phenomenon that causes humidity control challenges, air quality problems, as well as reliability and maintenance issues in standard staged dx air conditioning equipment.

Key Benefits of APR Control

  • Eliminates High Humidity
  • Reduces Temperature Fluctuations
  • Extends Compressor Lifespan
  • Protects Refrigeration Circuit
  • True load-matching up to 80% turndown on standard DX
  • Use it everywhere to meet space requirements

Founded 1993 by Davis Rawal, Rawal Devices manufactures highly efficient and cost-effective solutions that solve temperature and humidity control problems in commercial, industrial and institutional building applications. Our combination of technology, expertise and customer service ensures proper temperature and humidity control for greater comfort, indoor air quality and energy efficient performance, while providing an excellent return on your investment!

  • Rawal History

    The APR Control enhancement has been a proven solution since 1993 when founder Davis Rawal patented his innovative APR Control.

  • Leadership

    The APR Control enhancement has been a proven solution for nearly 30 years since founder Davis Rawal patented his innovative APR Control. Today the firm is managed by his son Richard, dedicated to growing Rawal Devices into a leadership position for HVAC control technology.

  • Responsiveness

    Rawal Devices’ technical staff is experienced, capable and responsive to the needs of HVAC professionals. Please contact us and we will be glad to assist you! Rawal Devices is particularly proud of our customer service availability and knowledge – call us!

  • Distribution

    APR Valves are available through select HVAC distributors, Counter sales, designated OEMs, and directly through Rawal Devices. Call us today for advice on your application and how to purchase.

  • Technical Proficiency

    Rawal Devices is the manufacturer of highly efficient and cost-effective solutions (including the APR Control (analog) and APR-E (digital) Valves) that solve temperature and humidity control problems in commercial, industrial and institutional building applications. Our combination of technology, expertise and customer service ensures proper temperature and humidity control for greater comfort, indoor air quality and energy efficient performance, while providing an excellent return on your investment!