BD2017

Purpose of the work

Purpose of the work

Windows according to the Passive House Standard 2016 require a ten times more airtight airtightness class (EN 14351) [1] than around 1990. The installation layer of the windows is constantly moving closer into the area of the insulating layer with possibly moisture-sensitive materials. Therefore, joint sealing of construction and connection joints must also be evaluated by applying parameters related to building physics like thermal conductivity, diffusion behavior, heat and moisture storage capacity, and the capacity for movement absorption.

Purpose of the work

With the German Energy Savings Regulation EnEV 2014 the legislators have qualified the requirements for large apartment buildings (V_L > 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.

Purpose of the work

Presentation of the newly created standard VDI 2083/19 (VDI is the Association of German Engineers) for airtightness tests of clean rooms.

Content of the contribution

It has been ten years since the publication of a draft proposal, and now, many hundred measurements without a binding standard for such a sensitive area later, the day has finally come. We have a standard dealing exclusively with the airtightness of clean rooms.

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

Purpose of the work

To guarantee the reliability of airtightness measurements.

Content of the contribution

In response to the questions of the three regional governments that had found quality deficiencies with regard to airtightness tests, the Belgian professional association has developed a control software and has organized the certification of airtightness testers.

Purpose of the work

This paper aims at reviewing and analysing changes and developments in various countries on building and ductwork airtightness in the past 5 years.

Method of approach

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.

Purpose of the work

To expand the use of BlowerDoor and thermal equipment combined with Radon

Method of approach

When building is set on very low negative pressure, use the Radon sniff-equipment called RAD7 to count radon at places where thermal imaging camera tell there is draft that can be assumed tob e leaks from the ground. If the found leakages are from the ground it often show higher level of Thoron, Radon and Polonium values, than the measurements elsewhere in the room.

Conclusions