LoginMarch 18-19, 2014 | "Quality of Methods for Measuring Ventilation and Air Infiltration in Buildings"
There is a trend to perform more ventilation and air infiltration measurements in buildings, either to strengthen
commissioning procedures or to learn from field data. This trend is stronger in nearly zero‐energy buildings projects
or programmes given the significant share of ventilation and infiltration losses on total building energy use.
Although there seems to be a general consensus on the benefits of this approach—e.g., in terms of attention paid to
the execution, confidence in actual performance, monitoring of programmes and regulations—there are logically
debates about the quality and cost of these measurements.
The objectives of this workshop are to review and to discuss:
- Recent and existing measurement methods for ventilation and air infiltration in buildings;
- Methods to estimate the uncertainty of those measurements;
- Conditions to obtain results whose quality is compatible with the purpose of the measurement;
- Conditions for large‐scale implementation and pitfalls to avoid.
The workshop will address primarily field measurement of airflow rates, air exchange rates, air velocities, and
pressures. Discussions and presentations may also include laboratory measurements as well as methods for
measuring air temperature, air humidity, contaminants, energy use and power related to ventilation and infiltration
in buildings. The methods will address natural, hybrid or mechanical ventilation, including ventilative cooling.
Speakers will also give background information on readily‐available measurement techniques.
Volume content
Field measurement testing of air tightness - example from a hospital project in Sweden | 2014 | English
Over the recent years more effort has been given to air tightness of public buildings such as hospitals.
On the use of infrared thermography to assess air infiltration in building envelopes | 2014 | English
Infrared thermography is an interesting technique that is often used for qualitative assessment of the building envelope. The method allows to detect construction deficiencies e.g.
Because of temperature-based uplift within the building and the impact of wind on the building, airtightness measurements of high buildings are especially challenging.
Durability and measurement uncertainty of airtightness in extremely airtight dwellings | 2014 | English
In this paper we present a series of leakage tests on extremely airtight dwellings (ACH50 < 0.6 upon completion) in which the durability of the airtightness and the measurement uncertainty involved are assessed.
Uncertainties and quality issues in CEN ductwork standards. Focus on ductwork pressurization tests | 2014 | English
This paper gives an overview of the work undertaken within CEN TC 156 WG 3 dealing with ductwork for ventilation in buildings.
Reasons behind and lessons learnt with the development of airtightness testers schemes in 11 European countries | 2014 | English
Mandatory building airtightness testing has come gradually into force in the UK, France, Ireland and Denmark.
Since 1995 with the first edition of the GUM by Joint Committee Guide for Metrology, (JCGM) expression of uncertainty in measurement takes a large part in measurement activities.
Measuring air flows and tightness of ventilation ductwork is compulsory in Sweden but not measuring air infiltration or building tightness which normally is done only in some research projects.
PROMEVENT: Improvement of measurement protocols used to characterize ventilation systems performance | 2014 | English
For the coming energy-efficient buildings, the guarantee of energy performance becomes a major challenge. It is therefore crucial to implement accurate and reliable measurements, in order to ensure this performance.
Comparative Analysis of the Methods for Measuring the Air Velocity and Flow in Mechanical Ventilation Systems | 2014 | English
The purpose of ventilation system is to provide and remove the airflow from room in accordance with its design.
To measure a flow in a closed duct, one of the available methods is to explore the velocity field. The duct is divided in elementary sections in which the velocity is measured. Using these elementary results, a mean velocity is calculated.