The single-family house in Bragadiru is the second Passive House in Romania certified by the PassivHaus Institute dr.Wolfgang Feist, Darmstadt, Germany. The house is realized from CLT (Cross Laminated Timber) with structural elements cut in the factory on CNC machines and built on site in 4 days. To meet the energy efficiency required by the Passive House standards, a continuous thermal envelope has been realized, from foundations to roof, with a heat transfer coefficient of 0.11w/m2k. Also, the energy efficiency standards have been attained through PHPP calculation, attention to window details (heat transfer coefficient Uw=0.85W/m2k), air tightness, no thermal bridges and by using a heat recovery ventilation. The insulation has been realized from solid wooden fibre panels and blown cellulose.
The air tightness test (BlowerDoor Test) showed a heat transfer coefficient n50 of 0.14 (the standard is 0.6) for which the energy consumption of the house is 10kwh/mp/year (the required standard is 15kwh/mp/year)
The building site also had an education goal. Over 40 architects and engineers had the opportunity to experiment with new materials and technologies and understand the details specific to Passive House standards.