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Sustainability 2016, 8(1), 97; doi:10.3390/su8010097

The Building Fabric Thermal Performance of Passivhaus Dwellings—Does It Do What It Says on the Tin?

1
Centre for the Built Environment (CeBE) Group, Leeds Sustainability Institute, Leeds Beckett University, Leeds LS2 9EN, UK
2
LEAP: Lovingly Engineered Architecture Process, Durham DH1 4HU, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Adrian Pitts
Received: 16 December 2015 / Revised: 12 January 2016 / Accepted: 14 January 2016 / Published: 20 January 2016
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Abstract

The Passivhaus (or Passive House) Standard is one of the world’s most widely known voluntary energy performance standards. For a dwelling to achieve the Standard and be granted Certification, the building fabric requires careful design and detailing, high levels of thermal insulation, building airtightness, close site supervision and careful workmanship. However, achieving Passivhaus Certification is not a guarantee that the thermal performance of the building fabric as designed will actually be achieved in situ. This paper presents the results obtained from measuring the in situ whole building heat loss coefficient (HLC) of a small number of Certified Passivhaus case study dwellings. They are located on different sites and constructed using different technologies in the UK. Despite the small and non-random nature of the dwelling sample, the results obtained from the in situ measurements revealed that the thermal performance of the building fabric, for all of the dwellings, performed very close to the design predictions. This suggests that in terms of the thermal performance of the building fabric, Passivhaus does exactly what it says on the tin. View Full-Text
Keywords: building fabric; dwellings; coheating; heat loss; in situ performance; Passivhaus; Passive House; performance gap; thermal bypass building fabric; dwellings; coheating; heat loss; in situ performance; Passivhaus; Passive House; performance gap; thermal bypass
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Johnston, D.; Siddall, M. The Building Fabric Thermal Performance of Passivhaus Dwellings—Does It Do What It Says on the Tin? Sustainability 2016, 8, 97.

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