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Pollution Control Unit

Pollution Under Control

System Description

The typical PCU includes a washable steel pre-filter and disposable, high efficiency (MERV 15) media filter. An additional high efficiency (MERV 15) / HEPA module is available for smoke control. Odor control is handled via an optional module ( typically 50/50 blend carbon/permanganate OR 100% carbon blend). An optional ESP module is available for electronic-type air cleaning. Sizes range in capacity up to 20,000 CFM.

The PCU is ETL listed and is suitable for indoor or outdoor installations.

Product Resources
Field Photos

View Installation Photos »


Applicable Standards: The PCU Series has been certified by ITS. This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. and Canadian products safety standard, that the manufacturing site has been audited, and that the applicant has agreed to a program of periodic factory follow-up inspections to verify continued performance.

Models PCU are ETL listed under file number 103624182COL-001 and complies with ULC-S647, UL-8782, UL-1978, ULC-S662, UL-867, and ULC-C22.2 No. 187 Standards.

Models KB10-INLINE through KB25-INLINE are ETL Listed under file numbers 103336443COL-001 and 102628244PRT-001 and comply with UL705 (electrical), and ULC-S645 Standards and CSA Std C22.2, No 113.

CaptiveAire Systems, Inc. certifies that KB models shown herein are ETL Listed under file numbers 3158877SAT-001 and comply with ULC-S645 Standards and CSA Std C22.2, No. 113

Models PCU are UL listed under project number 4787163176 and complies with UL1978, ULCS662 Standards.

Sustainable By Design

The CaptiveAire Pollution Control Unit, PCU Series, is designed specifically for the removal of grease particles and abatement of smoke from the air stream of commercial kitchen exhaust systems. The unit, if ordered with the optional odor control section, will reduce odors from the air stream. The PCU is designed for use with a CaptiveAire high efficiency self-cleaning or baffle ventilator but may be used with other high efficiency exhaust hoods.

PCU (Inside View)


  • Constructed specifically to meet kitchen exhaust duct standards
  • Optional Odor Removal Module
  • Suitable for indoor or outdoor installation
  • Unit may be shipped in one piece or in sections to facilitate entry and installation
  • Optional Pre Filter Section
  • Optional exhaust fan
  • Optional Advanced Filter Monitoring System
  • Optional CORE Protection Fire System


  • Pre-engineered for the most efficient and cost-effective systems
  • Listed by ETL Testing Laboratories, assuring acceptance by local building officials
  • Two year parts warranty

PCU with optional exhaust fan

Fan Features & Benefits

  • TEFC, Class H insulation, washdown duty motors
  • Heavy duty construction, durable and weather resistant
  • Non-overloading backward inclined wheels
  • Quick release latches allow for easy access to motor compartment
  • High efficiency combined with low tip speeds results in quiet operation
  • Standard emergency disconnect switch

Fan Options

  • Opposite Side Controls
  • Roof Equipment Rails
  • Side Discharge Outdoor Screen

System Description

The Advanced Filter Monitoring includes a module that provides the necessary precision pressure measurements for accurate monitoring of the complete system. Based on the measurements, the module will then initiate actions via the electric control package and give readings to the user. Direct access to the operating conditions are provided through the use of an HMI (human machine interface), which is conveniently located on the PCU.

System Features

Monitors Pressure Drop across each filter module of the PCU

Missing Door or Missing Filter Indication - fans and cooking equipment will shut off if faults indicated.

Detects Filter Saturation Percentage

Advanced Filter Monitoring System

The Pollution Control Unit (PCU) with Advanced Filter Monitoring option offers an automated assessment of the unit to ensure proper operation.
HMI - human machine interface
Screen showing Pressure Drop across Modules
Monitor Pressure Drop across each filter module

Advanced Filter Monitoring Benefits

  • Sustainability – Sustainability - Extends life of various filters, addresses specific filters which need replacement based on monitoring
  • Ease of Installation and Startup – automatic calibration of the system via HMI
  • Maintenance – Provides advanced notice, pinpoints specific faults to address
  • Reliability – Ensures proper operation of the PCU

Related Product

The SCS Control Panel is ideal for ESP self-cleaning system

Click here to view this product »

Electrostatic Precipitator (ESP)


An electrostatic precipitator (ESP) is an electronic air cleaner used to mitigate smoke and grease from commercial kitchen exhaust air streams. An ESP cell module can be integrated with other PCU filter modules. The ESP cell module has an integrated self-cleaning system to reduce maintenance costs.


  • Complete Solution – Interlocked with fans, self-cleaning system, and fire system controls
  • Reduces Maintenance – Self-cleaning system for ESP cells
  • Lower Pressure Drop – Lower pressure drop than comparable mechanical filters
  • Engineered to Your Needs – Flexible filter and ESP module configurations
  • Superior Durability – Spiked rigid plate ionizer and ceramic isolators ensure superior durability; more robust than wire-type ionizers


  • Pre and Post-Filters – Captrate© Solo and mesh filters keep water contained in the ESP module during a self-cleaning cycle and protect ESP cells from foreign debris
  • PCU CORE – For a reliable Fire Protection System
  • SCS Control Panel – Ideal for ESP self-cleaning system

How ESPs Work

Grease and smoke-laden exhaust pass through the ionizer section of the ESP cell(s). The cell design uses a spiked rigid plate to ionize the air stream through the phenomenon known as corona.

The charged air stream then flows through the collector section where particles are collected.

The above image shows the blue corona which is visible to the naked eye in low-light conditions.

System Description

The detection portion of the fire suppression system allows for automatic detection by means of an electric thermal detector located in the intake and outlet of the ductwork connection. If the Pollution Control Unit Firestat senses a temperature hotter than its internal setpoint, an electric signal is sent to the CORE Fire System Cabinet. An electric water solenoid is energized allowing the flow of water to the Pollution Control Unit mounted manifold.

The CORE fire suppression system is a pre-engineered, pollution control unit fire system that utilizes a water spray system for fast flame knock-down and suppression.

A system owner's guide is available containing basic information pertaining to system operation and maintenance. The system is installed and serviced by authorized distributors that are trained by the manufacturer.

The CORE circuit board is an ETL Recognized Component under Report number 101196419NYM-001. The PCBCORE board is certified as a releasing service for the CORE Protection Fire System.

Product Resources
Related Product

CORE Fire Protection for Commercial Kitchens

Click here to view this product »

PCU - Fire Suppression Systems

PCU CORE Control Panel

The CORE Protection Fire System is an automatic, pre-engineered fire suppression system. The CORE protection System is designed to provide primary coverage for Pollution control equipment including ducts and filters.


The system is ideally suited for use in restaurants, hospitals, nursing homes, hotels, schools, airports, and other similar facilities.

The PCU CORE control panel is limited to interior applications only. The system must be designed and installed within the guidelines of the Listed Design, Installation, Recharge, and Maintenance Manual.


  • Electric Fire Detection with Battery Backup System
  • Electric Remote Pull Station
  • Factory Installed in Utility Cabinet


  • System Reliability
  • Microprocessor Based Control to ensure Reliable Operation
  • Easy Installation and Service
  • Fire Suppression sprays until risk of fire is eliminated

Component Descriptions

Overview of all the pieces and parts that make up the CORE Fire Protection System.

CORE Circuit Board

The CORE Fire System printed circuit board is a microprocessor based control that provides all the necessary monitoring, timing and supervision functions required for the reliable operation of the CORE Protection Fire System. If a fault is detected anywhere in the CORE system, the audible alarm will periodically sound and the "Fire System Activated" light will flash a fault code to indicate the specific fault detected.

Electric System with Battery Backup

The detection and pull station for CORE comprise an electric circuit that is connected to a battery backup system. In the event of a power outage, the power to all gas and electric appliances must be disrupted through the use of electric gas valves or shunt trip breakers. The battery powers the detection and pull station circuits, as well as monitoring those devices.

Supervised Loop

The supervised loop incorporates both redundancy and fault detection. It is the means by which fire sensors and pull stations are connected to the CORE system.

CORE Control Cabinet

The CORE Control Cabinet contains most of the necessary components for the fire system to function. The control cabinet holds the manifold, surfactant tank and pump, CORE control board, power supply and battery backup.