Abstract
The article presents results of air permeability measurements carried out for envelopes of two entire typical single-family residential buildings and separately for envelopes of garages and residential zones of these buildings. The effect of taking into account separate air permeability measurements of building zones on the calculation results of infiltration heat losses and on the energy need for heating is analysed. The calculation results obtained in this way are then compared to calculation results obtained in the case of air permeability measurements of the entire building envelope.
Highlights
Heat losses have a significant influence on the results of the energy calculations for a building
Infiltration air flows depend on both the building's properties as well as on external conditions
The infiltration air flows were calculated in two variants: A) assuming the same n50 value for both building zones based on an airtightness test of the entire building envelope, B) assuming different n50 values for each building zone based on separate airtightness tests of building zones
Summary
Heat losses have a significant influence on the results of the energy calculations for a building. Infiltration air flows depend on both the building's properties (mainly the airtightness of the building envelope) as well as on external conditions (outdoor air temperature, wind speed and direction) For these reasons, they are difficult to determine. For calculations of the energy need for heating, a building should be divided into zones [2, 3] This division results mainly from different internal air temperatures and various heating and ventilation systems. In the case of a building divided into zones with different internal temperatures, the influence of different air permeability of particular zones can affect the calculations (according to the methods presented in [2, 3]) of the energy need for building heating. An attempt was made to show the impact of the method of performing and taking into account the airtightness tests on the result of calculations of infiltration heat losses and energy need for heating
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