Cost and thermal – technical optimization of wooden construction in the passive standard
The article describes the thermal – technical point of four wooden constructions in the passive standard, when one of the constructions was tested in an accredited laboratory 1007.4 thermal – technical diagnostics. The sample was made according to the laboratory´s requirement 1700 x 1700 mm and tested according to the test harmonized standard ČSN EN ISO 8990: 1994 Thermal insulation – Determination of thermal transmission properties in the steady state temperature – calibration and guarded hot box. The object of the tests was to declare heat thermal transmittance value – U value based on the measured surface temperatures (θsi) and energy consumption. Thermal resistance and thermal transmittance were empirically calculated according to the measured and standard values in accordance of the CSN 73 0540: 2011. Thermal protection of buildings. The other three structures will be structurally modified to reflect this normative value Upas 20 = 0.12 – 0.18 (W.m-2 . K-1) and ensure their cost optimization.