English

Reports field monitoring program by the Lawrence Berkeley Laboratory to assess the potential impact of reduced ventilation of indoor air quality. Three houses, designed to be energy-efficient, were monitored using a mobile laboratory. Parameters measured included infiltration rate, CO2, CO, NO2, NO, O3, SO2, HCNO, total aldehydes and particulates.

Reports the use of thermography for evaluating the effectiveness of a number of different retrofit measures carried out on single family dwellings in Twin Rivers. Discusses the use and limitations of thermography. Gives thermograms of parts of the houses before and after retrofit. Finds thermography is an effective tool for evaluating these retrofit measures which decreased the energy consumption by about 25%.

Reports pressure measurements made on five shapes of glasshouses, under natural wind conditions and generally over a 90 deg. range of direction. Gives pressure coefficients from 48 tapping points for four different glasshouses.

Describes a mobile laboratory designed for research and development studies of ventilation and energy utilisation in residential and commercial buildings. Describes the trailer and instrumentation chosen. Discusses factors considered in the design of the laboratory.

This is a practical handbook for retrofitting existing buildings. Describes with illustrations the addition of insulation, weatherstripping windows, and doors, addition of triple glazing and the installation of a vapour barrier. Discusses the savings for three different climate zones in Sweden.

Reports study to investigate the possibilities of purifying air from formaldehyde by using a filter that brings the air into contact with an adsorbent substance. Finds that the type of adsorbent substance that works satisfactorily is that which involves adsorption in combination with the oxidation breakdown of adsorbent substances. Compares costs for residential premises between a) an increase in ventilation and the use of a heat exchanger and b) the type of air purification and recirculation describes above.

Reports investigation whose object was to devise a quick and simple method for checking the airtightness of a whole building. Describes pressurization of building and gives results from 20 single family houses and five multifamily buildings. Finds that the majority of the multifamily buildings investigated conform to requirements in the regulations and about one half of single family houses satisfy the requirements stipulated for the transitional period.

Reviews tracer gas methods for measuring ventilation rate and discusses the diffusion of gases. Describes four tracer gas methods; rate of decay, equilibrium concentration, transfer index and constant concentration. Discusses the analysis of results. Describes an experimental room and series of measurements of air change rate using two methods a) rate of decay, where a balloon filled with gas was burst as a point source and b) equilibrium concentration where tracer gas was released continuously at a constant rate.

Reports measurements of natural ventilation and leakage rates in two test rooms in a university building. Describes rooms and instrumentation. Gives results of pressurization tests with windows closed but not sealed, sealed, and weatherstripped. Gives results of measurements of ventilation rate using N2O as a tracer gas. Discusses the analysis of results and experimental errors. Compares measured rates with ventilation rates calculated using crackand ASHRAE methods.

Describes computer program used for calculating heating and cooling loads on buildings. Discusses current state of heating and cooling load techniques and various unique features of NBSLD. Gives summary of various subroutines of NBSLD including an algorithm for calculating air infiltration Gives complete Fortran listing of NBSLD and data preparation forms.