Indoor air quality ventilation airflow rates and HV AC capital and operating costs usually are closely related. Auxiliary energy loads for supply air heating or cooling sometimes can substantially reduce the need for dehumidifying or humidifying by using air-to-air heat or energy exchangers. The most important factors in reducing HVAC capital and operating costs are ventilation airflow requirements, climatic parameters, exchanger recovery system performance factors and duration of operation.
This British Standard gives recommendations on the principles which should be observed when designing for the natural ventilation of buildings for human occupation.
Split-duct roof ventilators or windcatchers are used to provide both supply and extract ventilation to the spaces which they serve. However, buildings are often erected in conditions where there is no prevailing wind direction. An investigation into four and six segment windcatchers to determine their relative performances under different wind conditions was undertaken using scale models in a wind tunnel. Conclusions indjciate that six segment windcatchers have a more predictable, reliable performance in uncertain or variablewind conditions.
This publication summarizes current information on heating (both space and hot water heating), cooling and ventilation systems and equipment used in low-rise, residential buildings with regards to their effect on indoor air quality. An additional discussion of water purification systems is also presented.
Heavy industry in the UK may be on a downward spiral, but light manufacturing is springing up in its place. Can the structures housing these industries have less impact on the environment?
This CTU discusses the application of the rainscreen principle to the design of exterior walls, building on the concepts presented in Construction Technology Updates No. 9 and No. 17.
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