精东影视

Is the end of the transparent building nigh? Designs such as Foster and Partners scheme for the glazed fencing mask, also known as the Greater London Authority headquarters, could become a thing of the past if performance standards to avoid solar heating are introduced.

The changes in the regulations aim to reduce unwanted solar gain by 鈥渢he appropriate sizing and orientation of windows, and shading measures鈥�, and to limit internal temperature using 鈥渢he thermal mass of the structure to absorb excess heat in daytime and release it at night鈥�. To comply, designers will have to show, by calculation, that internal temperatures will not be excessive. And if designers are looking to keep temperatures down by introducing air-conditioning, the government has that option covered, too.

鈥淗eating, ventilation and air-conditioning are included in the regulations for the first time,鈥� says Ant Wilson of consultant Oscar Faber. 鈥淒esigners will have to justify the use of air-conditioning using performance standards. As long as it is not wasteful, they can put it in.鈥�

The proposals call for performance standards for buildings (larger than 200 m² in floor area) that are air-conditioned or mechanically ventilated. To comply with the regulations, designers will have to use a new method of calculation called a carbon performance index. This will allow the efficiency of the ventilation system to be assessed and will 鈥渆liminate a significant proportion of office practice that currently falls short of good practice鈥�, states the document.

Other changes to the regulations affecting building services include the proposal to introduce requirements for the commissioning of heating, hot water, ventilation, air-conditioning and lighting to ensure the systems work as they were designed. The onus will be on installers to certify that they have commissioned the systems to standards laid down by the Chartered Institution of 精东影视 Services Engineers. As in domestic installations, installers will be required to provide information to occupiers on how to operate their services efficiently.

The job of the commissioning engineer will be made easier by the new requirement to install meters to monitor energy consumption. Initially, this will provide building occupiers with the facility to monitor system performance, but is primarily intended for building occupiers to report and publish energy data under future changes to the regulations. New performance standards for boilers, heating and hot-water systems should also see big improvements in efficiency.

The efficiency of lighting will also be included. Display lighting was excluded from the lighting provisions introduced in 1995 but will now be covered, as will light fittings.