This report contains a brief description of an air infiltration measuring device jointly developed by the National Bureau of Standards and Princeton University's Center for Environmental Studies. The device maintains a constant concentration of a tracer gas (SF6) in each room of a structure by injection, and relates the infiltration rate for each room to the rate of gas injected. Specifics of construction and use are included.

This paper presents an account, and results, from the U.S. Gas Industry's on-going program to assess the effectiveness of various retrofit actions toincrease the seasonal efficiency of central, gas-fired, space heating, residential furnace

This paper presents an account, and results, from the U.S. Gas Industry's on-going program to assess the effectiveness of various retrofit actions to increase the seasonal efficiency of central, gas-fired, space heating, residential furnac

A large number of developments are under way in the United States of America aimed at providing new high efficiency, space heating equipment for existing and for new single and two family dwellings. The majority of these developments are s

This paper describes an original investigation of a new flowmeter and a method of balancing of airflow circuits in low pressure ventilating systems. The flowmeter is simple and robust in its construction, imposes virtually no resistance to

This report describes research undertaken to investigate the various factors affecting the air infiltration through windows. These factors examined include: 1) The effect of edge and face clearance or window fit 2) The effect of groove clearance on weatherstripping 3) The effect of weatherstripping 4) The effect of locking windows 5) A comparison of infiltration and exfiltration through windows 6) The effect of sash shrinkage, and 7) Theeffect of one-piece storm windows.

The problem of describing quantitatively the effective ventilation in a room when the air within the room is imperfectly mixed is discussed. It is suggested that the protection afforded by the ventilation to any given position against air

Building services accounts for some 40-50% of the UK's consumption of primary energy. The potential for energy saving through the adoption of such schemes as district heating, combined heat and power, heat pumps and solar energy could make a major contribution to the country's energy balance.

The purpose of this research project is for the Thermal Engineering Section of NBS to conduct air leakage measurements on selected large buildings tovalidate calculation formula developed by Shaw and Tamura, (see Shaw, C.Y., and Tamura, G.T., 'The Calculation of Air Infiltration Rate Caused by Wind and Stack Action for Tall Buildings', ASHRAE Trans., Vol. 83 part 2).

A comprehensive computer program for the prediction of air flow and smoke migration in the building was applied to the 11 story administration building of the National Bureau of Standards. Natural air leakage rates under various climatic conditions for several ventilation system operations were obtained. The computed results were compared with measured air leakage rate by using the sulphur hexafluoride tracer gas technique. Smoke migration was simulated for the selected pressurization conditions.