An influence of the control of heating system to the design heat load and demand of a building

The paper concerns the analysis of the factors, which have impact on thermal mode of a building. The heating power increase on behalf of intermittent heating effect is regulated by EN 12831 and new STR 2.09.04:2008. This additional heat load depends according to temperature drop, re-heating time period and thermal characteristics of envelopes of the particular buildings. The major part of building's thermal energy which is acting in dynamic heat exchange is accumulated in high weight building envelopes. Therefore the master's task is the estimation of stored (accumulated) thermal energy here. The main figure is thickness of massive structure where unsteady thermal processes appear and influence building microclimate and energy demands.