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Why are different methods offered for the calculation of energy needs in EN ISO 13790?

Each method has its own applications: the seasonal method is the simplest, but it is applicable only in climates where seasons are clearly defined, the monthly method is easy to use in buildings without or with small intermittence effects...
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How can I make the energy performance of systems visible on the Energy performance certificate (the energy label)?

This is possible if not only the overall energy performance (in MJ or kWh), but also the system energy performance is reported separately. The same goes for the local production of renewable energy. EN 15603 describes how this could be...
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Is there a roadmap or guidance to achieve one European calculation method on the energy performance of buildings?

There is a consensus within Europe that the built environment has a major task to reduce the CO2 emissions and convert to sustainable energy systems. The energy saving targets are high and there is a need to show in a non controversial way...
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Are the products, building products and systems, taken into account in the EPBD standards?

The energy performance of products is taken into account in an indirect way. The EPBD CEN standards are generally dealing with performance description of buildings and systems. The EPBD standards describe the way the system performance has...
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Are the CEN standards delivered as paper documents or as PDF?

This is up to the National Standard Body, most countries offer both possibilities. Question submitted by: Dick van Dijk (TNO, The Netherlands) Anwered by: Dick van Dijk, TNO and Jaap Hogeling, ISSO (The Netherlands) Date: 2008/03/10
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What is the difference between EN ISO 13790 and EN 15603?

EN ISO 13790 describes calculation methods for the energy need for heating and cooling for each building zone, whereas EN 15603 deals with the overall energy use and the energy performance of buildings, collating the results from other...
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What are the advantages and disadvantages of the holistic and the simplified approach?

The primary advantage of the more detailed and thus more advanced method (holistic approach) is the higher quality and reliability of the results, due to the very realistic model on which the calculation is based. The intermediate results...