Integration of building components and ventilation systems is an effective way to control thermal loads, especially cooling loads. The key point of the system which has been studied in this paper is a special hollow building slab which allows the penetration of variable ventilation air flows. The ventilation rate may be adjusted following a specific control strategy, in order to activate the thermal mass of the slab, and enhance the free cooling effect in the night time.
IQ-Test is a Thematic Network supported by the European Community under the EESD Programme.The objective of IQ-TEST is to further develop common quality procedures for the PASSYS/PASLINK test cell facilities that exist in 12 European countries. This should consolidate thenetwork, integrate the new test sites and strengthen its common approach of support for new product developments in the field of innovative building components.Round robin tests are underway to assess both the inter-site quality of testing and analytical procedures of the participants.
This paper presents results of an ongoing research conducted at the BEST Polytechnic ofMilan about the correlation between the over time degradation of building envelopcomponents and the indoor climate.
Microbial growth has been known as one of the major problems related to IAQ inresidential and commercial buildings. International and local standards define theupper limits of indoor relative humidity in order to avoid moisture related problems.However, setting limits on indoor relative humidity does not guarantee a mould-freeenvironment.
Indoor radon concentrations in high-rise buildings are found to be affected by two majorfactors, namely the ventilation rate and the radon production rate of building materials. In thispaper we present a method to apportion the indoor concentrations to their individual emissionsources. The method consists of two parts: one part is to determine the overall radonproduction rate in a sealed room space, and the other part is to determine the radon productionrate from a particular component. The methods are based upon mass balance models.
The Airinstruct project objective was to understand the thermal performance of ventilated building components, namely ventilated roof, ventilated wall, solar roof and dynamic insulation.
How should environmental profiles be used for construction materials? An environmental profile is a graphical presentation of environmental burdens. The concept may be used to present the results from a number of different stages within an LCA. The most effective use of profiles for materials and products in buildings has yet to be established; whether they should present raw data or data which have been interpreted and to what stage in the life of the material they should be applied.
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