Condensation risk and improved thermal performance of housing.

Considers the likely impact of alternative conservation measures on the incidence of surface and interstitial condensation on or within the elements of the building fabric. Considers specifically domestic buildings in temperate climates such as in the U.K. and Ireland. Outlines the mechanisms whereby condensation occurs and considers broadly the effect of reducing heating levels, reducing ventilation and increasing insulation.

Ventilation and air infiltration in buildings.

Briefly outlines the approach used and the results obtained by computer modelling in estimating the magnitude of natural ventilation in irish housing. Concludes that in general air-change-rates in irish housing are excessive.

Sulphur hexafluoride as a gas-air tracer.

Give method for collecting and analysing sulphur hexafluoride used as a tracer gas. The gas is separated by gas chromatography from other components of moist air on columns of silica gel and activated carbon in series and is detected by electron-capture analysis in concentrations near 1 p.p.b. states that sensitivity can be enhanced at least 2000-fold by freeze-out concentration. States that SF6 backgrounds in air are undetectable except near leakage sources such as transformers.

Ventilation requirements in rooms occupied by smokers: a review.

States that the need for fresh air to dilute cigarette smoke is the dominant criterion for ventilation design. Reviews the literature of the subject and concludes that the three main health factors are carbon monoxide, acrolein and particulate matter. Finds very wide differences in sensitivity between people. compares IHVE guide of 1970 with the british standard draft code of practice CP3 concludes that cigarette smoke shouldbe treated as a contaminant and not linked with body odour dilution.

The ionizing radiation in dwellings related to the building materials.

Reports measurements in seven groups of town house in Gavle, Sweden of concentrations of radon and daughter products. Gives results with the type of building materials, the ventilation systems and air-change rates measured using nitrous oxide as a tracer gas. Gives formula for the permitted limits of radionucleides in building materials. Discussed results and concludes that the concentration of radon does not differ significantly from single family to multi-family houses.

Wind pressure and strain measurements at the post office tower.

Presents some results not previously published of the full-scale loading project carried out at the post office tower, London. Autocorrelations and pressure spectra were determined for all the pressure transducers, and the variations of these around thestructure as well as vertically are discussed.

Movers and stayers: the resident's contribution to variation across houses in energy consumption for space heating

Proposes general method to identify contribution of resident-dependent effects to observed variability of energy consumption in similar houses. Method assumes that in addition to records of energy consumption over time, there is access to information about date of change of occupants. For data on TwinRivers, New Jersey, shows that the role of resident-dependent effects dominates the role of effects that depend on structural variations over which residents have no effective control.

Ventilation requirements

Discusses fresh air requirements and tolerable levels of contamination from various sources within a space. Explains the calculation of dilution rates. States that in summer the rates required will generally be higher than those derived from theinformation given because of the need to reduce temperatures in non-air-conditioned buildings and gives method for calculation of ventilation rate required.

Comparison of model/full-scale wind pressures on a high-rise building.

Reports results of surface wind pressure measurements made simultaneously at thirty-two points on a 57-storey office tower in Toronto. In addition to readings taken at half-second intervals during high winds, mean and root-mean square pressures were recorded for a five-minute interval once each hour, and pressure coefficients referred to the free stream dynamic pressure at 286 m were computed for comparision with wind tunneltest information.

A preliminary appraisal of wind loading concepts of the 1970 Canadian National Building Code.

Describes the philosophy and formulation of the simple and detailed procedures for wind loading of the Canadian National Building Code of 1970. Defines design pressure in terms of the exposure of the building, its response to gusts, the mean velocity pressure and the structural shape of the building. Compares predictions of dynamic drag response and cladding pressures with full scale measurements on several tall buildings. Concludes that the predictions of drag response and windward pressure are satisfactory. Discusses area requiring further definition.

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