Reports measurements of the natural ventilation through a vertical sash-window in calm weather. Describes test window and room. Gives theoretical expression for the ventilation depending on the amount the window is open, inside to outside temperature difference and the difference in height of the openings. Reports two tests of ventilation rate made using smoke. Concludes that a vertical sash window gives very good ventilation even without wind. Finds that tests corraborated the formula which would also apply to a deeper room.
Describes test rig used to measure air leakage through a metal framed window. Gives average of results of leakage for different air pressure. Finds leakage rate of 20 cu. ft/h/ft for air velocity of 30 m.p.h. which was generally less than published results.
Describes a probe, developed to measure air flow which can be used to find the leakage profile of a window. Discusses measurement principle, accuracy of measurement and experimental method. Suggest use of the probe for locating leakage points andgiving quantitative data of the amount of leakage. A possible use is for testing windows that are already installed in buildings
States reasons for sealing joints:to increase sound insulation, protect from water penetration and to control air infiltration. Identifies three main types of joints, structural joints, joints between casement and wall and between glass and frame. Discusses for each type methods of caulking.
Provides table showing that annual heat loss through windows in U.S. accounts for about 5% of total energy consumption, or around 1.5 times energy derived from oil transported by alaskan pipeline, costing $30 billion annually. Describes relatively simple window treatment to eliminate substantial portion of thisloss which involves tightly sealed, interior-applied insulating panels. Demonstrates how performance of several such systems was predicted and verified by standard test methods.
Reports investigation of air leakage through windows. Gives tables of air leakage of various types of windows with their dimensions, crack length, number of corners and length of air paths within cracks. Suggest that this information can be used to calculate the heat flow through windows.
Login