Submitted by Maria.Kapsalaki on Fri, 10/27/2023 - 10:03
AIVC's Ventilation Information Paper #47 gives guidance to perform a pressurization test in high-rise buildings and suggests new criteria to replace standard requirements when they cannot be met.
The AIVC is happy to announce the release of a new publication!
AIVC's Ventilation Information Paper #46: Building airtightness impact on Energy Performance (EP) calculations aims to explain simplified models developed and used around the world to estimate the infiltration rate for Energy Performance (EP) calculations and give some examples of methodologies applied in various countries.
Submitted by Maria.Kapsalaki on Fri, 09/22/2023 - 13:11
Many simplified models have been developed and are used around the world to estimate the infiltration rate for Energy Performance (EP) calculations, with different levels of accuracy, as described below. For example, the wind velocity can be estimated hourly, monthly or annually; based on the local climate or fixed estimated values; with or without taking into account shielding factors; etc.
AIVC's Ventilation Information Paper #46 aims to explain these simplified models and give some examples of methodologies applied in various countries.
Submitted by Maria.Kapsalaki on Wed, 06/28/2023 - 17:03
Cracks in building fabric lead to air infiltration due to wind and buoyancy driven forces. In the heating season, the cold air entering the building needs to be heated up to room temperature, thus leading to an energy demand. Conventionally, the measured infiltration rate at 50 Pa (expressed as n50 or q50) is recalculated into an average infiltration flow rate (yearly based) using leak infiltration ratio’s (LIR) ranging from 0.033 to 0.1, the origin of these values being sometimes unclear.
Submitted by Maria.Kapsalaki on Tue, 06/27/2023 - 18:22
The fan pressurization method that is widely used to measure the airtightness of buildings is known to have quite large measurement error. It is made up of random measurement error (precision) and systematic measurement error (bias).
We are happy to inform you that the recordings and slides of the AIVC & TightVent webinar; "Alternative methodologies to evaluate airtightness" held on June 19, 2023 are now available online here.
Check them out and subscribe to our YouTube channel to receive our latest video updates!
The AIVC is inviting you to register for the upcoming webinar "Alternative methodologies to evaluate airtightness" to be held on June 19th, 2023 (10:00 - 11:30 CET). Participation is free for all, but prior registration is required.
For further information on the detailed agenda, registration etc. please follow this link.
Submitted by Maria.Kapsalaki on Thu, 05/11/2023 - 11:24
A pressurization test with a blower door fan is the most widely accepted and used method to evaluate the airtightness of a building, but it presents some drawbacks. Alternative methodologies have been, or are being, developed and three of them were presented in this webinar:
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