A new guide on variable refrigerant flow (VRF) air conditioning was published in December 2017 ior cibse vrfas a joint publication from the Institute of Refrigeration and CIBSE. IOR members will be able to download it for FREE from the web site. Over the last 30 years VRF systems have established themselves as effective cooling and heating technology in a range commercial applications. During this time VRF manufacturers have innovated and developed their own range of different VRF solutions. With increased focus on energy efficiency, carbon emissions and sustainability, the need for guidance on the design, application and use of VRF cooling and heating systems has become more important.

The main purpose of this publication is to provide an independent source of information to assist designers in selecting and configuring VRF systems to realise their optimum environmental and economic potential. Specifically, it provides:

  • an understanding of the technology and its applications
  • explanations of the differences between VRF and alternative technologies
  • information on the availability and comparability of systems
  • information on the calculation of heating and cooling loads and effects on component selection
  • an understanding and recognition of the importance of diversity and capacity ratios in VRF applications
  • guidance on how to achieve energy efficient systems
  • information on how best to specify VRF systems
  • advice on commissioning procedures
  • information on maintenance, training and resources

Free to IOR and CIBSE members. £72 inc VAT for non members.

Download the new IOR CIBSE VRF Air Conditioning Guide

Or search all of our publications in the Technical Information download area.

 

Recent posts

ior logo square

Members invited to feedback on update and review of IOR Constitution

24 Feb 2026

A review of the IOR Constitution has been carried out to ensure it complies with current Charity Commission guidance and improve the wording for clarity.  Open for consultation and comment by members until 30th April 2026.

Consultation
Talent Board

IOR Joins The Construction & Built Environment Interim Talent Board

9 Apr 2026

The IOR Education Outreach Project Manager, Matt Harvey, has been appointed to the London's Construction & Built Environment Interim Talent Board to represent the RACHP Sector.

Education
EngTech 25 Logo

IOR EngTech Section Celebrates 25 Years of Supporting Technicians

30 Mar 2026

The Institute is marking the occasion with a special offer designed to support the career progression of section subscribers.  

News
 ISA Full House

Skills Alliance Event Fully Booked - But Still Many Ways to Join In

23 Mar 2026

The IOR Skills Alliance's first meeting in Milton Keynes is at capacity, but there are still many ways to take part in the alliance's work.

Education
Craig Steve ACR

IOR Board of Trustees Members Honoured at the ACR Awards

23 Mar 2026

Congratulations to Steve Benton FInstR and Craig Girdlestone FInstR for this well‑deserved recognition for their dedicated, often behind‑the‑scenes contributions to the industry.

News