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Price RFDD floor displacement diffusers are ideal for use where low induction floor level flow is required. The diffuser slots discharge air in a displacement manner, horizontally across the floor, where it is drawn to heat loads and transports heat and contaminants up to the return grilles in the ceiling.

These diffusers create a horizontal flow using narrow slots arranged in a star pattern with a perforated section in the center to resist induction of room air. This generates a low turbulence flow with low velocities to minimize draft when located near seated occupants. This low level discharge is ideal for supplying cool air across the floor of the room and allowing it to rise as the heat load from people and electrical equipment is absorbed. The 8" (200 mm) diameter diffusers can be placed within 24" (610 mm) of a seated occupant while maintaining a draft rate of less than 10% according to ASHRAE 55-2004.

  • Optional variable air volume basket (DBV) for non-ducted VAV applications
  • Core is ready for installation in stepped bore installation. Optional ring press fit and ring law allow for insertion in through-bore floor tiles
  • Complete range of accessory baskets, dampers, fasteners, etc.
  • Discharge air volume is adjustable at the diffuser face without removing diffuser from the floor. Minimum airflow is adjustable from 0% to 50% of maximum airflow
  • Diffuser face has positive interlock, reducing the potential for accidental adjustment of diffusers

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  • Displacement Ventilation

    Brochures

    The Displacement Ventilation Brochure covers the wide range of Price products available for displacement ventilation, as well as the resources and support Price offers related to displacement ventilation. This brochure is designed for engineers and architects.

  • Displacement Ventilation Architectural Portfolio

    Brochures

    The Displacement Ventilation Architectural Portfolio is intended to showcase the custom design and architectural integration capabilities of Price displacement products.

  • Displacement Ventilation in Schools

    Brochures

    The Displacement Ventilation in Schools Brochure is designed to illustrate to engineers and architects how and why to apply Price displacement ventilation products in educational facilities.

  • ModuFlex Brochure

    Brochures

    This brochure provides an overview of ModuFlex, an Underfloor Air System Solution that is easy to apply. Learn more about how the system combines state of the art controls and Price’s years of occupant comfort experience to provide a tailored solution that achieves a comfortable building environment and maximum flexibility

  • Optimal VAV Control of UFAD Systems: Time Modulation vs. Flow Modulation

    Brochures

    This article provides an overview of both time modulation and flow modulation air flow strategies.

  • Underfloor Air Distribution

    Brochures

    "The Underfloor Air Distribution Brochure covers the wide range of Price products available for Underfloor Air Distribution as well as the resources and support Price offers related to Underfloor Air Distribution. This brochure is designed for engineers and architects."

  • Displacement Ventilation Engineering Guide

    Engineering Guides

    Displacement ventilation is an air distribution technology that introduces cool air into a zone at low velocity, usually also at a low level.

  • Underfloor Products Engineering Guide

    Engineering Guides

  • Displacement Ventilation

    Representative Project Lists

    A representative list of projects across various geographical territories, organized by application type.

  • Underfloor Air Distribution

    Representative Project Lists

    A representative list of projects across various geographical territories, organized by application type.

  • Stratified Systems Case Study Library

    System Libraries

    This case study library highlights several projects using Price’s Displacement Ventilation or Underfloor Air Distribution products including: • San Francisco Airport Terminal 2 • JE Dunn Construction Headquarters • Legacy Junior High School • Manitoba Hydro Place • Kauffman Center for the Performing Arts • RBC Centre • Banner Health Center Maricopa • “Foundation Headquarters” • California ISO Headquarters

  • California ISO

    Case Studies

    The new California ISO Headquarters utilized Price Displacement Ventilation and Underfloor Air Distribution to help achieve LEED Platinum status.

  • Kauffman Center for The Performing Arts

    Case Studies

    Carefully integrated Displacement and Underfloor systems allowed Price to meet the demanding aesthetic requirements of the Kauffman Center, resulting in a stunning symphony of architecture and air.

  • Zip Clips

    Installation and Start-up Videos

    Round Underfloor Diffuser with Zip Clips™ Installation Procedure.

  • ARFHD - 50CFM

    Smoke Tests

  • Thermal Plumes

    Smoke Tests

  • Stratification vs. mixing in underfloor applications

    Training

    This video compares stratification and mixing in underfloor applications by looking at indoor air quality, energy efficiency and thermal comfort.

  • Concepts and Designs for Underfloor Air Distribution

    Architect Focused Webinars

    September 2014 – The energy efficiency, high air quality, low noise, occupant comfort and design flexibility of underfloor air distribution systems make them an excellent match for a variety of applications. Office buildings, educational facilities, libraries, casinos, performing art centers and more can benefit from the highly customizable and elegant design afforded by a raised floor air distribution system.

  • A Focus On Plenum Integrity, Construction and Maintenance

    Engineer Focused Webinars

    February 2016 - This webinar will focus on the common issues of plenum leakage. Suggested design approaches and strategies for addressing leakage will be discussed, as well as post occupancy considerations.

  • Designing Overhead Air Distribution for Increased Occupant Thermal Comfort

    Engineer Focused Webinars

    March 2016 – Recent ASHRAE research has shown the impact of lower minimum air volumes by diffuser outlet type. The impact of these lower air volumes on the occupant and the energy consumption will be explored.

  • Designing Stratified Air Distribution (Displacement and UFAD)

    Engineer Focused Webinars

    Using the buoyancy effect and letting the air stratify in the occupied space can lead to improved occupant thermal comfort and energy savings. The general concept and several building case studies will be explored.

  • Introduction to Displacement Ventilation

    Engineer Focused Webinars

    Hour long webinar discussing displacement ventilation products, theory, and design considerations.

  • Introduction to Underfloor Air Distribution

    Engineer Focused Webinars

    October 2014 – Underfloor air distribution delivers a higher level of future flexibility than any other air distribution system. It also provides opportunities for energy use reductions, improvements in indoor air quality and occupant comfort, and individual zone control for a completely customizable air distribution solution. These features make underfloor air distribution an excellent choice for commercial, educational, performing arts, and retail applications.

  • Solutions for Perimeter Zoning with UFAD Systems

    Engineer Focused Webinars

    July 2012

  • Underfloor Air Distribution: An Introduction to Benefits & System Design

    Engineer Focused Webinars

    February 2012

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