Certification and quality assurance

Certification

Passivhaus buildings maintain comfortable indoor temperatures all year round with extremely low energy demands. This is achieved by careful design, robust detailing of the building fabric and services, and effective quality control of the construction process. Certification is essentially the formal assessment and approval of the quality of the project.

Essentially Passivhaus certification is a quality control process that ensures that the building will perform as designed. It is advisable that a building certifier or experienced CEPH designer/consultant has early input into the design pre-planning stage as they will be able to advise on the insulation and glazing choices in relation to the orientation and massing of the design. The other crucial stage is a pre-construction check, where confi dence can be given that the design will meet the Passivhaus target, ideally before work on site starts.

Claiming the Passivhaus Standard

Within the UK, there are occasionally claims that buildings meet or exceed the Passivhaus standard simply because they might meet one or more of the Passivhaus requirements. For example they achieve the air-tightness target, or utilise...

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Passivhaus Certified Component

The Passivhaus and EnerPHit standards are characterised by very high energy savings compared with standard construction. This is achieved by highly efficient building systems, careful planning and very efficient components. As a rule of thumb,...

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The Passivhaus Standard is voluntary and based purely on building physics which applies to both domestic and non-domestic buildings. The criteria for Passivhaus certification are performance based, instead of individually specified construction...

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Don't
Leave the collation of information to the last minute as this could cause delays in the building being certified.
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Assume that a building specification from a previous development will suit all future Passivhaus buildings
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Do
Make sure you are using the correct climate data within PHPP.
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Model your design in PHPP at the early design stages
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Engage with a Passivhaus Certifier at the earliest opportunity
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A number of UK organisations have been approved to assess and issue the Passivhaus Certificate, the EnerPHit Certificate (for retrofit projects) and PHI Low Energy Building Certificate.

Details of PHT members & partners who can provide UK certification can be found below:

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All accredited Passivhaus certifiers use check-lists for their quality assurance, which are normally provided on their appointment to the project. These check-lists should be referenced during the design stages with information collated as the project develops; this will save time when checks...

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