This parameter study with the IMG calculation model for ventilation is an attempt at forming some background for decisions relating to the preparation of a standard in the Netherlands. From the results one can see that air tightness and the heat loss caused by infiltration cannot be considered as a simple linear relationship .

The needs, history, procedures, and past case studies for the house doctor approach are outlined. This program of individualized instrumented energy audits and retrofits has reached a stage in development where steadily increasing numbers of house doctors are envisioned for the years immediately ahead.

Describes how through ventilation can reduce the effectiveness of balanced ventilation systems in dwellings incorporating air-to-air heat exchangers.

Describes the methods and considerations employed in the development of a detailed monitoring and evaluation programme for passive solar residences. Data analysis is performed by determining the hourly heat transfer of all critical energy transfer components, using an on-site microprocessor based data acquisition system. Discusses air infiltration as one of the components, and describes measurement methods, including pressurisation and tracer gas techniques.

Investigates what minimum fresh air supply per person is required to prevent unacceptable odour annoyance due to stale smells in offices and comparable buildings. The experiment is carried out in different buildings in rooms of varying size and occupancy density, with mechanical or natural ventilation. Determines the air supply to the room, the CO2 concentration, the number of lighted cigarettes, the odour concentration and the extent of odour annoyance to occupants.

Uses a multi-channel infra-red gas analyser to measure nitrous oxide tracer gas concentration at six points round a house. Combines concentrations to give overall house ventilation rates and to estimate the air exchange between individual rooms. The gas analyser is also used to measure air movement between the house and its roof (with 5 sampling points in the house and one in the roof). Results show that typically 20-30% of the air that enters a houseleaves via the roof space through gaps in the ceiling.

This report is a guide to give the canadian builder practical information in the area of energy conservation in new housing. Offers useful suggestions for planning, designing and building a more energy efficient home. Sections covered include energy use in dwellings, air tightness, ventilation andmoisture control, options for improving the building shell, space heating and cooling systems, and cost considerations. Takes the 1979 Ontario Building Code as the basis upon which to develop and evaluate improvements.

Describes the extent of the problem of condensation in roof spaces of well-insulated dwellings, discusses the mechanisms resulting in condensation, and evaluates possible solutions. Factors considered in condensation occurrence include air movement to the roof space, and roof space ventilation rates. Control measures discussed include direct extract ventilation to the kitchen and bathroom to control water vapour, and the provision of adequate roof ventilation according to British Standard BS 5250.

The results of a prediction method for calculating ventilation rates in a detached house are compared with experimental measurements described in aprevious paper. The method is capable of giving good agreement for a wide range of ventilation conditions. The need is demonstrated for further work in two important areas - the spatial distribution of background areas and the effect of turbulence.