English

The heating system of a Junior High School in Minnesota has been re-equipped with a CO2-controlled variable ventilation system. The outdoor air dampers remain fully closed whenever the CO2 concentration is below a specified setpoint. During the early months of 1980, the system operated in alternate periods under the conventilanal temperature-driven control strategy and the experimental CO2-driven control strategy.

Reports on experiments carried out on models with trough roofs in order to study the influence of parapet height and wind turbulence. The models were exposed to both turbulent shear flow and a smooth uniform flow. Pressure coefficients were c

States that it is accepted practice to determine wind effects on and around a building by measurements in a scaled model in a boundary-layer wind tunnel. At large scales of reproduction it is impossible to simulate the entire depth of the atm

Outlines a method for measuring air infiltration using the tracer gas decay technique. SF6 is introduced into a building, and once it is well mixed, container samples of air (in this case plastic bottles) taken over a period of time are analy

Describes air leakage tests performed in 2 similar houses (one with added insulation and increased airtightness) using the fan pressurization method. Air infiltration measurements were also conducted using the tracer gas decay method and CO2

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

Reports the results of over 100 tests of 6 different warm air schemes. The temperatures and the removal of a tracer gas were monitored at several points and the data used to determine the temperature efficiency and ventilation efficiency. For ea

Describes method and equipment for measuring air leakage from windows.

Makes an inventory of different outside wall structures and details their construction with respect to heat losses. Notes that in some countries, little consideration is made of energy losses and that Building Regulations in Sweden are strictest.

Reports on the problem of increased carbon monoxide poisoning in houses resulting from new energy conservation construction techniques, which improve the airtightness of houses.