Individual and guard-zone measurements in apartment buildings - Measuring results

Purpose of the work

With the German Energy Savings Regulation EnEV 2014 the legislators have qualified the requirements for large apartment buildings (VL > 1.500 m³). In addition to the air change rate (n50 ≤ 3,0 h-1 or n50 ≤ 1,5 h-1 depending on the ventilation technology used) the envelope-based air permeability (q50 ≤ 2,5 m³h-1m-2) is now also required.

Planning and implementing airtightness with an airtightness design

According to the legal regulations and the rules of technology (as generally accepted) new buildings are to be constructed permanently airtight.

Airtightness in North America seen from Building Physics Viewpoint

Environmental control (heat, air and moisture flows and their effects) started 90 years ago on Prairies of Canada and USA. It has always been based on occupant’s interest in a better indoor environment and driven by builders. More recently, when energy efficiency and durability considerations became part of socio-economic requirements of the society this part of building physics was shifted to the interests of governments.

There is a draught, so what? Robust, tried and tested solutions ‒ Airtightness designs of structural elements and building components

Proposals for solutions in accordance with German standard DIN 4108 Teil 7 What does real life look like? What can actually be solved? Challenges, interface issues between the different trades and crafts, and possible suggestions for solutions.

Infiltration through leaks? A careful analysis of minimum air change according to DIN 1946

Purpose of the work

Can the minimum air change in naturally window-ventilated units be covered only through leakages?

Content of the presentation

In general, the infiltration airflow rate is dependent on meteorological conditions, especially wind pressure on the building / unit, and with regard to thermal effects, the temperature differential between the interior and the exterior, i.e. the infiltration airflow varies strongly.

New framework for reliable pressurization tests of buildings in Belgium

Purpose of the work

In Belgium, airtightness of buildings is taken into account in the regional Energy Performance of Buildings (EPB) regulations. When measured, it can be used in the calculation in place of a default unfavourable value and therefore improve the calculated performance.

LL 35: Building & Ductwork Airtightness (2020 Edition)

AIVC Literature List 35 is linked to the topics of “building & ductwork airtightness”. The document is split into 3 main chapters including:

  1. papers & slides presented at AIVC & TightVent Europe annual conferences and publications produced in collaboration with AIVC & TightVent Europe,
  2. slides presented at workshops organized with the collaboration of AIVC, TightVent Europe & the QUALICHeCK platform, and
  3. recordings from webinars organized with the collaboration AIVC, TightVent Europe & the QUALICHeCK platform.