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Energy Calculation

Special dynamic tools offer a possibility to analyse the compatibility of heating systems and building envelope. A closed fire place’s surface temperature according to time, as well as heating power supplied by the fire place. Analysis by VTT Talo.

There are two kinds of energy calculation typically needed for a Passive House. Correspondence to national energy requirements can be done by following the guidelines of these standards. These calculations typically use monthly based climate data.

The Passive House Planning Package (PHPP) enables a possibility to easy-to-use and accurate analysis of concept design. PHPP calculation can be used for assessing the performance of the house with regard to Passive House definition. However, energy designer must make sure that the tool is accepted for calculations for building permission. Different countries have their own calculation methods to assess the compliance with building regulations.

The performance requirements of the Passive House may require dynamic calculations at least if a house concept is new and not much experience is gained. Indoor climate and thermal environment calculations require dynamic simulation. Dynamic simulation tools like IDA-ICE, TRNSYS, TASE, Energy+, Capsol etc. can be applied also in solving complicated building envelope/system combinations.