AIVC - Air Infiltration and Ventilation Centre

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Infiltration and air quality in well-insulated homes - 2. Effect of conservation measures on air exchange and energy use

Air infiltration in two well-insulated houses is being investigated to determine its effect on energy use and indoor air quality. The first paper of this series provides a general perspective on the design. This paper reports on the effect on conservation measures taken, including the installation of an air-to-air heat exchanger, on air exchange and energy use. A third paper presents pollutant measurements and modelling results.

Some factors affecting the concentration of radon and its daughters inside houses

Plastic track detectors LR-115 and CR-39 were used to estimate the concentration of radon-222 and its daughter products (218Po, 214Po) in a room by recording tracks of their alpha-particles. Although the ventilation rate is the main factor th

Indoor air quality. 20 existing homes.

Complaints related to moisture problems in houses which had been air sealed, led to a study of indoor air quality in 20 weatherized demonstration homes in the Cambridge, Ontario area. 

Field survey of indoor air pollution in residences with suspected combustion related sources

Thirty residences were monitored for nitrogen dioxide, carbon monoxide, formaldehyde, respirable suspended particles, and air exchange rate for forty-one one-week periods using integrating samplers. The residences were located in the northwest a

Continuous monitoring in occupied residences of air contaminants from unvented combustion sources

Continuous monitoring of NO, NO2, CO, CO2, and O2 depletion was conducted in 14 residences (13 with kerosene space heaters and one without) in two locations in the residence (room with the heater and bedroom) and outdoors. The continuous monitor

Characterization of residential air pollution from unvented kerosene heaters

Investigates the generation of pollutants from unvented convective and radiant kerosene heaters in a residence over a 3 month period. The measured concentrations of carbon monoxide were low. However, under the conditions of use which were studied concentrations of SO2, NO, NO2, and CO2 reached or exceeded levels recommended for indoor air. Further, it was demonstrated that using a semi-open door to provide ventilation did not reduce concentrations of pollutants to acceptable levels.

Indoor air quality field survey strategies

Indoor air quality sampling strategies and analytical techniques have changed significantly in the past ten years. The changes reflect both the shifts in study objectives and the development of new forms of instrumentation. Toillustrate these trends, this paper describes early field techniques for measuring indoor air quality using a heavily instrumented mobile laboratory that is suitable for measuring one building intensively for up to four weeks.The style of measurement now is complemented by large field survey projects using passive samplers as the dominant instrumentation.

A systems approach to the monitoring of indoor air pollutants

Building design and building construction technology has improved in the past decade and the concern over indoor air pollutants and their health effects has increased. A multi-point, multi-pollutant air sampling and analysis network was insta

Verification of calculation models of air infiltration using three types of test houses.

In order to verify the calculation models of air infiltration using three wooden test houses which have the same type of construction but have different leakage distributions, airtightness of building components of these three houses were measured by means of the fan pressurization method, and then air infiltration was measured twenty-two times by C02 concentration decay technique.

Air change and air leakage as a function of inflow. Luftwechsel und Luftleckage in Abhangigkeit der Einflussparameter.

In discussion of air infiltration, we must consider air leakage flow, air change, air changes per hour at 50Pa, the surface permeability coefficient, the component permeability coefficient and equivalent leakage area. Air change and air leakage data are given for multiple family houses, single family houses, offices, industrial buildings and single cell elements.