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What to do with visible mold infestation at the construction site? How can I locate a hidden mold infestation? Which aspects have to be considered during mold renovations? Legal aspects regarding warranty, claims for damages and notices of defects. Mold occurs especially during cold seasons at the construction site...

Airtightness is mandatory, as are ventilation concepts. Today, the construction/renovation of a building without a ventilation system is impractical in terms of energy efficiency. The minimum air change rate and moisture protection should not be neglected either. According to my experience as an expert in this field, more than 75 % percent...

Windows are positioned / adjusted before occupants moving into a building. Their settings may change due to their daily use and mechanical or other impacts during their service life. A window service readjusts the windows. The project investigates potential savings in terms of air infiltration and energy savings as such...

Poor air quality in classrooms is a well-known problem. Achieving good air quality with window ventilation during the cold season requires a great deal of attention and time to the detriment of school lessons. Delivering appropriate air exchange rates for classrooms is only possible by sacrificing some thermal comfort. When replacing...

This article presents the results of an HVAC diagnosis carried out in a large office building consisting of 257 high-pressure induction units (Spilotair®) connected to seven air-supply ductworks. This system is used for heating, cooling and ventilating purposes. This installation is located in France near the Bordeaux-Mérignac Airport...

The study presented in 2019 on paired, alternating air handling units (push/pull units) found that wind load peaks can have an impact of up to 100 Pascal of differential pressure on air handlers. Yet, these units can only be tested up to a pressure sensitivity of 20 Pascal. The building authority DIBt specifies in its technical approvals...

In Denmark, a manufacturer and dealer of vapor barrier membranes has observed unusual behavior. The membranes were installed in a small house and show that the system can be set up and be tight. What is interesting is that the airleak range changes over time, and becomes approx. twice as leaky over two months, but then...

Exhaust air dampers are part of an extraction system and a permanent penetration in the thermal building envelope, even though the vent is out of operation most of the time (about 23.5 hours per day). Exhaust air dampers with air leakages can cause considerable infiltrations resulting in significant heat losses. We used the MLM measuring...

We all know that the airtight or sufficiently air-impermeable (which is the physically correct term) building design is state-of-the-art, i.e., complies with the “Recognized and Generally Accepted Good Engineering Practices”. It is relatively easy to achieve a sufficiently air-impermeable design for new buildings when ensuring that it is...

This presentation is the recording of the first 100 airtight tests in Greece, from 2010 until today. The inspections were carried out in private homes and in large-scale commercial buildings, of different construction dates, renovated or not, in various cities of the country and on islands. Most of the inspections were carried out in the area of Attica...