AIVC - Air Infiltration and Ventilation Centre

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ventilation

Airing a problem

States that current building regulations on ventilation are very inadequate. Describes the Scottish Development Department document The future of building control in Scotland. This proposes a local authority liaison committee with reps from building control and fire services to co-ordinate work on operating building control in Scotland. It also recommends approval of standard house types of different conditions between authorities. Suggests this could usefully be introduced to England and Wales.

Ventilation investigation in large buildings

After a brief treatment of the ideas and aspects that play a role in ventilation, gives a general outline of chosen investigation methods, with a concise review of apparatus and calculation models used. Presents a review of the ventilation investigations carried out by IMG-TNO during the last 10 years in factories, labs, hospitals, auction halls etc.

Energy savings through reduced air infiltration in houses.

Energy is consumed in heating the air infiltrating into houses maintained at temperatures above ambient. By using climatic data tapes and a daily profile for indoor temperature of a house, it is possible to calculate factors, which in conjunction with a relationship between air change rate and wind speed enable the energy consumption due to infiltration to be calculated on amonthly basis. This has been done for Melbourne, Australia and the factors tabulated on a monthly, annual and heating season (April Nov) basis.

The practical calculation of the radiation load on waste air windows with intermediate louvres.

Waste air windows protected by intermediate louvres show the share of absorption in the transmission coefficient to be dependent upon the air throughput through the window. To calculate it, a general solution is given. Practical calculation is simplified by graphs established for two common louvre designs in two, three and four-pane windows.

Air quality control strategies for health, comfort, and energy efficiency

Within the last ten years, energy shortages, economic pressures, and changes in indoor environmental requirements have resulted in buildings that are more energy efficient but less forgiving, environmentally. These results indicate that energ

An overview of ventilation research in large non-residential buildings.

A short treatment of the concepts and aspects that play a role in ventilation is followed by a brief description of the investigation methods employed. Gives a concise survey of the equipment and mathematical models used. Reviews the ventilation research carried out by the IMG-TNO. Covers factories, laboratories, hospitals, auction halls and similar buildings.

Methods for the measurement of airflow rates in ventilation systems. Metoder for matning av luftloden i ventilations installationer.

Describes methods for measuring air flow rates and air velocities in buildings, with the aim of formulating identical rules within the Nordic countries for the inspection and adjustment of ventilation systems.

Good indoor climate with up-to-date ventilation system. Godt indeklima med tidssvarende ventilationslag.

Briefly describes the new DIF standard for ventilation plants and the Danish standard DS 447. Discusses the relationship between heating and ventilation. Mentions heat recovery and problems encountered in ventilating swimming halls.

The impact of ventilation rates on the design of office buildings.

Reports on a study conducted to determine the impact of different ventilation rates on office building energy use, first cost, and peak electrical demand. Uses the DOE-2.1 computer program to simulate an energy-efficient office building in 5 cit

Air infiltration problems in ventilation systems.

Presents the latest results of air infiltration research in Finland. The aim is to increase the knowledge of the influences of air infiltration on energy consumption, ventilation and indoor climate. Briefly describes the principles of a calculation model for predicting the interconnection between airtightness and air change rate. Describes improvement of air tightness in Finnish buildings, with special attention to construction details. Discusses possibilities of draughtless and controlled fresh air intake through the building envelope.

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