CPAs – Critical Process Air Systems

EVAPCO’s Critical Process Air (CPA) systems meet the demanding requirements of temperature, pressurization, and air purity control with humidity and condensation control required in industrial refrigeration.
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The EVAPCO CPA – Critical Process Air Systems is designed specifically for the industrial refrigeration market and offers complete flexibility in design with a comprehensive choice of quality components integrated together to create a state-of-the-art, custom air handling unit backed by the industry’s most experienced critical process product design and system application engineers.


  • A wide array of accessories or modifications are available to suit any scenario or environment
  • Smooth interior free of potential mold or bacteria growth spots
  • Ranging in airflow from 1,000 CFM to 112,000 CFM
  • AHRI Certified Performance in accordance with AHRI Standard 420


EVAPCO Sanitizing System (ESS™) Technology

Specifying the EVAPCO Sanitizing System (ESS) with your CPA System will virtually eliminate hazardous bioaerosols from the cooling coil/pan, resulting in hygienically clean air and improved product quality while maintaining system performance and significantly reducing annual maintenance costs.

  • Uses UVC light
  • Provides Full Germicidal Effect at Low Air Temperatures
  • 700% more effective than a standard UV bulb
  • Destroys byproducts from mold and bacteria
  • Eliminates manual coil cleaning

Interior Service Lights

  • Standard LED and Hygienic LED options
  • Available from 1000-8400 lumens
  • Unit includes light in each section

Sure-Aire Airflow Measuring

  • Measures the pressure drop across the fan inlet venturi to provide airflow measuring
  • Accurate to within 3%
  • No increase in fan energy consumption or noise levels
  • When paired with a VFD, the unit control system can vary the blower speed to maintain the desired unit airflow

Surge Drum Catwalk System

  • Fully-assembled support system for the surge drum
  • Includes OSHA ladder (with cage), full perimeter handrail, and aluminum safety grating so workers can safely access the surge drum and associated valves

Motor Removal System

  • I-Beam with manual trolley designed to assist workers with the removal and installation of blower wheel and motor (as necessary).

EVAPCO Service Vestibule

  • Provides a space protected from the elements for workers to service the unit.
  • Vestibules are insulated, heated, and ventilated (as required).

EVAPCO Service Platform

  • The platform shares common base steel with the CPA unit and does NOT require external support.
  • Includes pre-cut aluminum safety grating, galvanized steel handrail system, and self-closing safety gate

Additional Options:

  • Standalone, factory installed, Allen Bradley Compact Logix (standard) or Control Logix PLC systems
  • Allen Bradley Panel View Plus HMI’s (6” standard on the main control panel)
  • NEMA 4X remote panels with push-buttons (standard) or an Allen Bradley HMI
  • Allen Bradley Power Flex Series VFDs
  • Stainless steel interior liner (dampers, drain pans, walls, ceiling, and filter frames)
  • Stainless steel exterior

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