An investigation of air exchange between rooms and outside air. Untersuchung uber den Luftaustausch zwischen Wohnraumen und Aussenluft.

Natural ventilation of inhabited rooms is studied with regard to its dependence on wind velocity and temperature difference between the interior of buildings and outside air. On the basis of simultaneous aerosol and carbon dioxide measurements an attempt has been made to separate the two components of air exchange: ventilation through walls and ventilation through clefts and chinks.

The choice of windows depending on their exposure. Memo for foremen Choix des fenetres en fonction de leur exposition. Memento pour less maitres d'oeuvre

This is a short guide to the choice of a type of window, considering its position and exposure to wind. Defines exposure grades for windows. Gives recommendations for choice of windows considering air permeability, water tightness and wind resistance. The catagories of windows are as defined in standard N F P 20 302.

Methods of testing windows part 1. air permeability test.

Describes test apparatus and method of testing windows for air leakage. This standard has been adopted by the following countries :- Austria, Belgium, Denmark, France, Italy, Netherlands, Spain, Switzerland and United Kingdom. It is available in English, French or German.

Thermography. Testing of the thermal insulation and airtightness of buildings.

Discusses in general terms energy consumption and energy requirements and the testing and checking of buildings. Gives principles of thermography and discusses the influence of various parameters on the thermography of buildings. Gives rules for interpretation of thermograms and use of comparative thermograms. Gives examples of comparative thermograms for common defects in insulation and airtightness, and actual cases where certain constructions and components were examined. Shows effectiveness of improvements made to remedy certain types of defects in insulation and air tightness.

Joint directives for the acceptance of windows. Directives communes pour l'agrement de fenetres.

Describes standard tests for air leakage, water-tightness and mechanical tests to be carried out on windows. Describes apparatus and test method. Defines normal resistance to air leakage as air penetration of 12 to 60 m3/h/m2 of the surface at a pressure of 10mm. of water. At air penetration of less than 12 m|3/h/m|2 the windows have improved resistance to air penetration.

Window air leakage.

Briefly reviews air leakage around windows. Discusses heat loss through windows, dependence of leakage on pressure difference across windows, effect of leakage on condensation. States that tight windows can save heating and cooling costs but weatherstripping is necessary for tightness.

Ventilation and the draught-proofing of windows in old blocks of flats.

Presents results of measurements of ventilation rate and window air leakage made in blocks of flats in Sweden. Describes measurement of ventilation rate using nitrous oxide as a tracer gas and pressurization tests on windows. Gives graphical results of tests. Finds that the majority of windows do not satisfy 1975swedish building code. Reports measurements of air leakage of windows before and after renewal of draught excluders. Concludes that old windows can be made relatively draught-free and that this is not expensive or time consuming.

Adventitious ventilation of houses.

Describes the research being undertaken by the British Gas Corporation on adventitious ventilation. Outlines a test house programme which has quantified adventitious areas for both room components and progressively sealed rooms in dwellings of varying age and construction. Describes a model scale approach to natural ventilation aimed at predicting room air movements and ventilation rates. This work is compared with full-scale results and theoretical models.

Air leakage of buildings - a literature list.

A bibliography of references on the subject of air infiltration, lists references in alphabetical order of author and gives short index to broad subject headings.

Natural ventilation. Ofrivillig ventilation.

Reports investigation of airtightness of two types of industrial wall when subjected to a differential pressure across the wall construction. Laboratory tests were performed on wall units, overlap joints in vapour barriers of plastic sheet,on steel stud wall with metal sheeting and joints in the light- weight concrete element wall being studied. Shows that methods of construction employed so far can be retained if modifications are made concerning junctions and the sealing of joints. In sheet metal walls, the contact pressure onto the plastic foil must be guaranteed.

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