Plenum Boxes

CPB Circular Plenum

Waterloo circular plenums are ideal for use in installations that have exposed duct work and exposed ceilings, the circulars plenums can be supplied in raw material finish or powder coated to your requirements. The plenums suit square or circular faced diffusers.

  • Models:
    CPB
  • Construction:
    Side entry or top entry.
  • Air Properties:
    Internal baffle to equalise air flow.
  • Duty Range:
    Bespoke sizes available on request.
  • Velocity Range:
    Dampers available on request.
  • Pressure Range:
    Acoustic lining available on request.
  • Free Area:
    Black internals on request.
Click here to view product specification

Plenum Box to suit MC / WR Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBR
  • Air Properties:
    Side Entry spigot, dimension to suit the diffuser neck size
  • Duty Range:
    For MC and WR Circular Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box to suit SDCH Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    SDP
  • Air Properties:
    Side / Top Entry spigot, Ø 97 – 697mm
  • Selection Criteria:
    For SDCH Circular Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box to suit SDV Swirl Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    SDVP
  • Air Properties:
    Side / Top Entry spigot, Ø 97 – 427mm
  • Duty Range:
    For SDV Vane Swirl Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box to suit SDF Swirl Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    WTP
  • Air Properties:
    Side / Top Entry spigot, Ø 97 – 697mm
  • Selection Criteria:
    For SDF Swirl Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box to suit CS / LCS / DSL Slot Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBHL
  • Construction:
    Up to 4 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    Rivet / Hem fix, Low-Line / High-Line
  • Duty Range:
    For CS / LCS / DSL Slot Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box to suit CSB Barrel Slot Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBHLB
  • Construction:
    Up to 4 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    Rivet/Hem fix, Low-Line/High-Line
  • Duty Range:
    For CSB Barrel Slot Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box to suit FCD Fan Coil Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBHLH
  • Construction:
    Up to 4 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    Rivet/Hem fix, Low-Line/High-Line
  • Duty Range:
    For FCD Fan Coil Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box / Neck Reducer to suit AL Airline Linear Grilles

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBLG / NRG
  • Construction:
    Up to 4 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    Low-Line / High-Line
  • Duty Range:
    For AL Airline Linear Grilles
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box / Neck Reducer to suit Exhaust Grilles

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBG / NRG
  • Construction:
    Up to 4 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    Low-Line/High-Line
  • Duty Range:
    For all Exhaust Grilles GC5 / PER / 3 Series
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box / Neck Reducer to suit D Diffusers

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PBD / NRD
  • Construction:
    Up to 4 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    Low-Line/High-Line
  • Duty Range:
    For D Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Plenum Box / Neck Reducer to suit SG Security Grilles

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes

  • Models:
    PBSG / NRSG
  • Construction:
    Up to 2 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    For SG Security Grilles
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Metal Plenum Box to suit Aircell Diffusers (M and 2 series)

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control, acoustic / thermal insulation where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    PS
  • Construction:
    Up to 2 connections, Side/Top Entry spigot, Circular/Flat Oval/Rectangular
  • Air Properties:
    For M and 2 series Aircell Diffusers
  • Product Options
    Options – 6mm acoustic lining (optional) reaction to fire class C-s3-d0 to EN 13501-1: 2007
Click here to view product specification

Polymer Plenum Box to suit Aircell Diffusers (M and 2 series)

Our proprietary range of plenum boxes guarantees a good mixing of the air prior to diffusion through the terminal, as well as providing flow control where required.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    P
  • Construction:
    Black ABS Polymer, Side/Top Entry spigot, Snap-in Locks
  • Mounting Options:
    For M and 2 series Aircell Diffusers
  • Product Options
    Options – Neck Reducer (size 600 only)
Click here to view product specification

Polymer Neck Reducer to suit Aircell Diffusers M600 and 2600

Our Aircell neck reducers can be used in conjunction with the Aircell P600 Polymer Plenum Box to bring the connection down to Ø 312mm.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    R600
  • Construction:
    Black ABS Polymer, in combination with Aircell P600 Plenum Box
  • Mounting Options:
    For M and 2 series Aircell Diffusers
  • Product Options
    Spigot down to Ø312mm
Click here to view product specification

Polymer Neck Reducer to suit Aircell Grilles

Our proprietary range of Aircell Polymer Neck Reducers allows for the Grilles to be easily connected to the ductwork.

Note – any performance data provided for Grilles & Diffusers is valid only for use with Waterloo plenum boxes.

  • Models:
    N
  • Construction:
    Black ABS Polymer, Top Entry spigot, Snap-in Locks
  • Product Options
    For Aircell Grilles
Click here to view product specification
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