energy audit services | LDArchitects

By: Loic Dehaye Architects  05/12/2011
Keywords: Energy Audit, Audit Services

We are currently using Passive House Planning Package 2007 for most of our projects as a tool to optimise the design in terms of energy performance and compliance with new building regulations.

The PHPP is primarily a tool for verifying a building has met the “Passiv Haus” standard in terms of the specific heat requirement and overall primary energy requirement.

It is also a very practical tool for optimizing designs, e.g. by varying insulation thicknesses, window size and types, and building orientation and geometry, you can see the effect these changes have on the final heat requirement, and thus adjust the design.

The PHPP looks at the building fabric and key components in a passive house and includes tools for:

  • Calculating the U-values of components with high thermal insulation
  • Calculating energy balances- Designing comfort ventilation- Summer comfort calculations
  • Calculating the heat load (including Irish climatic data)
  • And many other useful tools for reliable design of passive houses

The passive house standard is a specific construction standard for buildings (any building) which results in good thermal comfort conditions all year round without traditional space heating systems and without active cooling.

The energy requirement of passive house is:

  • Annual space heating requirement of 15kWh/m2a treated floor area
  • The upper limit for total primary energy demand for space and water heating, ventilation, electricity for fans and pumps, appliances and lighting not exceeding 120kWh/m2a, regardless of energy source
  • The air leakage test results must not exceed 0.6 air changes per hour using 50 Pascal over pressurisation and under pressurisation testing.

Keywords: Audit Services, Energy Audit

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