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 to architectural practices, governing bodies, developers and private clients through:-


  • Design stage PHPP pre- assessment modelling. Ideally executed pre-planning to inform the design process. Refining elements that could facilitate the attainability of Passivhaus, EnerPHit or Low Energy Certification.

  • Final stage PHPP modelling and associated drawings for submission to PI Certifier.

  • Fabric first consultation and advice for  architectural detailing related to Passivhaus matters.

  • On-site consultancy to address technical issues around airtightness, cold bridging, ventilation, water permeability etc. aiding project managers, contractors and tradespersons.



Definition from Passipedia :-


"The Passive House Planning Package (PHPP) contains everything necessary for designing a properly functioning Passive House. The PHPP prepares an energy balance and calculates the annual energy demand of the building based on the user input relating to the building's characteristics.

The PHPP forms the basis for quality assurance and certification of a building as a Passive House or an EnerPHit retrofit

The main results provided by this software programme include:

  • The annual heating demand [kWh/(m²a)] and maximum heating load [W/m²]

  • Summer thermal comfort with active cooling: annual cooling demand [kWh/(m²a)] and maximum cooling load [W/m²]

  • Summer thermal comfort with passive cooling: frequency of overheating events [%]

  • Annual primary energy demand for the whole building [kWh/(m²a)]

Among other things, the PHPP deals with the following aspects:

  • Dimensioning of individual components (building component assemblies including U-value calculation, quality of windows, shading, ventilation etc.) and their influence on the energy balance of the building in winter as well as in summer

  • Dimensioning of the heating load and cooling load

  • Dimensioning of the mechanical systems for the entire building: heating, cooling, hot water provision

  • Verification of the energy efficiency of the building concept in its entirety

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