BRE Building Elements: Building Services: Performance, by H.W. Harrison

By H.W. Harrison

The fourth ebook within the BRE development parts sequence, this e-book is set the gamut of fuelled, piped, ducted, stressed out and mechanical amenities which expand over the total age variety of the UK’s construction inventory. it's the caliber of heating, synthetic lighting fixtures and different prone, resembling refuse disposal which makes an different clever naked carcass liveable - even effective and relaxing.

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By H.W. Harrison

The fourth ebook within the BRE development parts sequence, this e-book is set the gamut of fuelled, piped, ducted, stressed out and mechanical amenities which expand over the total age variety of the UK’s construction inventory. it's the caliber of heating, synthetic lighting fixtures and different prone, resembling refuse disposal which makes an different clever naked carcass liveable - even effective and relaxing.

Show description

Read Online or Download BRE Building Elements: Building Services: Performance, Diagnosis, Maintenance, Repair and the Avoidance of Defects (BR 404) PDF

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Additional info for BRE Building Elements: Building Services: Performance, Diagnosis, Maintenance, Repair and the Avoidance of Defects (BR 404)

Example text

This technique is used to identify thermal bridges or areas of reduced thermal insulation, and therefore higher surface temperatures where heat is being lost to the outside of the building 24 Case study Effects of different forms of glazing on energy consumption Experiments on the comparative energy consumption of houses with single, double and heat reflecting glazing were carried out in the BRE ‘matched house pairs with simulated occupancy’. The pairs of semidetached houses were heated intermittently with gas fired boilers and radiators controlled by thermostatic radiator valves.

The design of this house and its services ensures that as small a contribution as possible is made to the problem of global warming. 11 Kitchens are among the worst locations for the production of condensation, usually from cooking, particularly in older properties where both heating and ventilation provision are inadequate. Persistent condensation leads to mould growth. In this particular case it seems as though additional factors, such as thermal bridging at ceiling level (seen as a differential pattern of mould growth) and poor air circulation (which has led to the crescent shaped pattern of mould on the ceiling at the far corner), may be partly to blame :KLOHFRQGHQVDWLRQLQLWVHOIPD\QRW JLYHULVHWRPRUHWKDQDWHPSRUDU\ QXLVDQFHWKHPRXOGJURZWKZKLFK RIWHQDFFRPSDQLHVSHUVLVWHQW FRQGHQVDWLRQLVPRUHOLNHO\WRJLYH VHULRXVFRQFHUQ 7KHWZRPRVWFRPPRQVLWXDWLRQV LQZKLFKFRQGHQVDWLRQRFFXUVRQWKH YHUWLFDOH[WHUQDOHQYHORSHDUH ● VLQJOHJOD]HGZLQGRZV ●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± UHDVRQDEOHKHDWLQJDQGYHQWLODWLRQ 30 Case study Condensation on the walls of a 1920s terrace house BRE investigators were presented with a problem of mould growing on the inside faces of the external walls in bedrooms and bathroom.

11 Kitchens are among the worst locations for the production of condensation, usually from cooking, particularly in older properties where both heating and ventilation provision are inadequate. Persistent condensation leads to mould growth. In this particular case it seems as though additional factors, such as thermal bridging at ceiling level (seen as a differential pattern of mould growth) and poor air circulation (which has led to the crescent shaped pattern of mould on the ceiling at the far corner), may be partly to blame :KLOHFRQGHQVDWLRQLQLWVHOIPD\QRW JLYHULVHWRPRUHWKDQDWHPSRUDU\ QXLVDQFHWKHPRXOGJURZWKZKLFK RIWHQDFFRPSDQLHVSHUVLVWHQW FRQGHQVDWLRQLVPRUHOLNHO\WRJLYH VHULRXVFRQFHUQ 7KHWZRPRVWFRPPRQVLWXDWLRQV LQZKLFKFRQGHQVDWLRQRFFXUVRQWKH YHUWLFDOH[WHUQDOHQYHORSHDUH ● VLQJOHJOD]HGZLQGRZV ●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± UHDVRQDEOHKHDWLQJDQGYHQWLODWLRQ 30 Case study Condensation on the walls of a 1920s terrace house BRE investigators were presented with a problem of mould growing on the inside faces of the external walls in bedrooms and bathroom.

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