Publisher's Synopsis
The use of ceiling-mouted air terminal devices for warm air heating of perimeter zones can lead to difficulties in establishing a suitable room micro-climate because of downdraughts from the windows. A solution is to provide additional under-sill heating, but this is not always aesthetically desirable or practicable, and in these circumstances there is little information available to assist the designer in the selection of a suitable room air distribution system.;The objective of this guide is to present a method which may be used to assess the conditions where it is possible to provide all the heating by ceiling-mouted slot terminal devices, with no additional under-sill heat source. If such a source is necessary to avoid excessive downdraught the method also indicates the required output of this source.;The suitability of the basic design may be determined using this "Application Guide", but, for the selection of suitable diffuser sizes, reference should be made to manufacturers' catalogue information or to "HVRA Laboratory Report No 81, Supplements A and B [1]".;This guide is an update of the previous "Application Guides [2,3]", which were based on experimental work described in BSRIA "Report 15/101 [4]".
