The heat loss associated with the external fabric of a building has been greatly reduced by the increased levels of modem insulation, but heating losses associated with cold external air flowing into a building via leakage points in the external facade are still a major problem. Some ventilation is necessary but a detailed knowledge of this leakage would enable the major heat loss routes to be blocked. A crack has been studied which has hot air of a known temperature and flowrate passing over it.
A heat recovery system reclaims heat from outgoing stale air, supplying it to incoming fresh air. The energy benefit is greatest if it supplies all the fresh air to the house and none enters via uncontrolled openings, hence ventilation heat recovery (VWR). A sunspace (or conservatory) attached to a dwelling will almost always be at some temperature above ambient. Heat losses by conduction through the adjacent building fabric and ventilation losses via cracks will be reduced.
Contains 16 papers including: Keynote Paper, Potential and limits of energy savings in the Swiss building stock; Recommended retrofit actions based on air infiltration evaluations in a variety of buildings; Air infiltration control in housing - a guide to international practice; The measurement of air infiltration rates in large enclosures and buildings; Ventilation measurements in large buildings; Air leakage ia industrial buildings • preliminary results; An oveview of ventilation research in large non-residential buildings; Improvement of airtightness in four schools; Air infiltration in
Login