Information Sheet 22 Use of the hot box apparatus - loft insulation

Publication Year

1984

Document Status

Withdrawn

Abstract

Describes the use of one of the BBA's hot box apparatuses to measure the thermal performance of insulation materials in a traditional UK loft construction under controlled air flow and temperature conditions. Summarises and discusses the reduction in thermal performance of fibrous loft insulation materials as the mean air flow is increased over the exposed upper surface. Also examines the influence of moisture and mass air movement through a material in modifying the measured thermal performance and surface heat transfer coefficients from the theoretically expected values.

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