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Annex 87 held its second working phase meeting in a hybrid format in Lausanne, Switzerland on September 11^th and 12^th, 2023. There were 16 in-person attendees and around 28 online attendees. The annex team had very fruitful discussions on the annex in general and on subtasks. The progress in subtasks and the next steps were discussed. Most of the subtasks made substantial progress by breaking down the work into smaller parts and having started the work.

On November 15^th, 2023, IEA EBC Annex 80 scientists, designers as well as representatives from the building cooling and ventilation associated industry gathered for the 8th meeting of the Advisory Board of Practitioners (ABoP).

The 25^th issue of the TightVent newsletter is now available!

Specific contents include:

We are pleased to announce that the AIVC 2024 Conference “Retrofitting the Building Stock: Challenges and Opportunities for Indoor Environmental Quality" is now accepting abstracts & proposals for topical sessions. The Conference will be held on October 9-10, 2024, at Croke Park, Dublin, Ireland. It will be a joint event combined with the 12th TightVent and the 10th venticool conferences.

The AIVC is inviting you to register for the upcoming webinar "Smart ventilation in non-residential buildings. How to assess? How to design?" to be held on December 12^th, 2023 (15:00 - 16:30 CET). Participation is free for all, but prior registration is required.

For further information on the detailed agenda, registration etc. please follow this link.

On 4-5 October 2023, the AIVC – TightVent – venticool 2023 joint Conference “Ventilation, IEQ, and Health in Sustainable Buildings”, was organised by the International Network on Ventilation and Energy Performance (INIVE) on behalf of the Air Infiltration and Ventilation Centre (AIVC), the Building and Ductwork Airtightness Platform (

The ASHRAE Singapore Chapter (ASC)  in collaboration with the Air Infiltration and Ventilation Centre (AIVC) is organising a 1 ½ -day workshop to be held on April 18-19, 2024 in Singapore. The workshop will be led by experts from the AIVC and the ASHRAE Singapore Chapter. It is intended for engineers, architects, and other professionals who want to learn more about ventilation, IEQ and sustainability.

The event will take place at the Surbana Jurong Campus.

The workshop main themes include:

We are pleased to announce the release of a YouTube collection including some of the highlights of the 43^rd AIVC conference: “Ventilation, IEQ & health in sustainable buildings” held on October 4-5, 2023, in Copenhagen, Denmark. The playlist includes a selection of recorded presentations from the opening session’s keynote speeches as well as the recordings of the closing session’s best paper, best poster and student competition awards:

Paper, poster & student competition awards were given during the closing session of the joint 43^rd AIVC – 11^th TightVent – 9^th venticool conference: “Ventilation, IEQ and health in sustainable buildings” held in Copenhagen, Denmark on 4-5 October 2023.

Best paper award:

The jury for the best paper award, consisting of Hilde Breesch (KU Leuven, Belgium), Benjamin Jones (University of Nottingham, UK), Valérie Leprince (Cerema, France) & Iain Walker (LBNL, USA) nominated the papers listed below:

The evaluation questionnaire of the 43^rd AIVC conference: “Ventilation, IEQ & health in sustainable buildings” was sent out to 200 attendees of the event. 98 participants filled in the evaluation form. We are happy to share with you a summary of the main results!

General outcomes: