AIVC - Air Infiltration and Ventilation Centre

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VIP 05: Displacement Ventilation

The principle of displacement ventilation involves air supply and distribution in a room by upwards displacement, i.e. as direct as possible through-flow in the occupied zone in order to achieve high ventilation efficiency. In addition, air distribution by displacement generally makes it possible to supply a larger quantity of air than for conventional mixing ventilation, which requires concentrated supply at high velocity.

VIP 04: Night ventilation strategies

Addressing successful solutions to counterbalance the energy and environmental effects of air conditioning is a strong requirement for the future. Possible solutions involve the use of passive cooling techniques and in particular of heat and solar protection techniques, heat amortisation and heat dissipation techniques. Recent research has shown that night ventilation techniques may contribute highly to improve thermal comfort in free floating and decrease the cooling energy consumption of air conditioned buildings.

VIP 03: Natural ventilation in urban areas

Natural ventilation is one of the most effective passive cooling techniques. Because of the serious reduction of the wind speed in the urban environment and the corresponding reduction of the air flow rate, for both single and cross configurations, the cooling load on the buildings inside the canyons is much higher than the one of buildings where wind is not obstructed. Thus, it is very important to consider, other techniques than windows to enhance air flow in urban buildings.

VIP 02: Indoor Air Pollutants Part 1: General description of pollutants, levels and standards

Pollutants found in indoor air are often several times higher than outdoors. Indoor air pollutants cause effects ranging from odor, annoyance, and irritation to illness, cancer, and even death. Since people spend the majority of their time indoors, it is important to recognize and control indoor air pollution. Some indoor air pollutants also adversely affect materials in the building and the building structure itself. The majority of indoor pollution comes from the building itself, its contents, or its occupants and their activities.

VIP 01: Airtightness of ventilation ducts

The necessity to make waterproof sanitary water ducts or central heating tubing and to make airtight natural gas distribution tubing is of primary importance to both construction professionals and the public. However, the airtightness of ventilation ducts and heating or cooling ducts is subject to less attention.
An assessment campaign, aimed to measure the latter, was conducted within the framework of a European project , and demonstrated that the leakage in air ducts in France and Belgium reached figures up to 20% of the average nominal flow rate.

Ventilation Information Papers

Ventilation Information Papers (VIP) are a series of typically short AIVC publications (in most cases 6 to 10 pages) intended for giving a basic knowledge of some aspects related to the air infiltration and/or the ventilation.

Ventilation Information Papers

Ventilation Information Papers