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Adaptation of a single family house project to a passive standard


The aim of the work is to adapt the existing or projected building to the standard of a passive building. The main criterion for achieving a passive standard is to obtain a utility energy demand for heating ≤ 15 kWh / m2year and a primary energy demand for heating, hot water, electrical appliances, lighting, household appliances and RTV ≤ 120 kWh / m2year. Adaptation is comprehensive and covers all building components that affect its energy efficiency.



  1. Performing energy analysis - in terms of energy demand of a single-family house complex on the basis of a preliminary project
  2. Identification of improvements to reduce the heat demand for heating a detached house to 15 kWh / m2a. The improvements will concern:
    a. shape of the building for optimum A / V ratio
    b. reduction of heat loss by penetration - determination of required thermal insulation of outer partitions, reduction of thermal bridges, determination of required thermal insulation of window and door joinery
    c. Reduction of heat loss for ventilation - Determination of the required mechanical efficiency of ventilation and exhaust ventilation with heat recovery and consideration of the correctness of the ground heat exchanger, determining the required air tightness of the building
    d. increase the energy efficiency of the domestic hot water system, consider the use of solar collectors
  3. Identification of improvements to maximize the heat gain from the sun by selecting the optimum distribution and size of the windows on the individual façades.
  4. Identification of improvements to ensure the required comfort in the summer
  5. Identification of improvements to reduce the demand for electricity consumed by lighting and other electrical appliances
  6. Select the best source of energy for the object
  7. Selection of the optimal set of modernization improvements:
    a. Presenting to the investor the influence of particular improvements on the energy performance of the building
    b. Consultation with the investor to select the optimal set of improvements


  1. Development of detailed solutions which constitute technical and economic assumptions for the passive version of the object. Specific solutions will be:
    a. Solutions of structural details free to thermal bridges
    b. how to install window frames
    c. Consultation on the design of the ventilation system and the heating system
    d. Consultation on the design of the hot water supply system
    e. tight coating solutions in the building and construction details to ensure that they permanently tight connection
    f. Solutions of shading and ventilation elements allowing to provide comfort during summer
    g. Consultation on energy source design
  2. Determining the heat demand for the passive version of the object
  3. Calculation of the estimated annual operating costs of the facility in the standard reference year


  1. Training for contractors to familiarize themselves with the passive standard prior to commencement of the investment
  2. Consultation and supervision at the stage of construction work, with particular emphasis on critical moments:
    a. Construction of structural components free of thermal bridges
    b. window installation
    c. seal coatings
  3. Supervision at the stage of installation work


  1. 1. Performing a tightness test at the "building shell state"
    2. Issue of IBP certificate
    3. Obtaining a PHI certificate in Darmstadt

Analysis methods, tools used

Calculation of heat demand for building heating and peak heating power

The calculations are made by using computer programme Passivhaus Projektierung Paket 2004 with algoritm based on the German and European Standards and the Pasivhaus Institut's instructions:

  • CEN EN 832 - Thermal Performance of Buildings - Calculation of Energy Use for Heating - Residential Buildings
  • DIN EN ISO 13370 - Thermal Performance of Buildings - Heat transfer via the ground - Calculation methods
  • EN ISO 6946 - Building components and building elements - Thermal resistance and thermal transmittance - Calculation method.
  • EN ISO 10077 - Thermal performance of windows, doors and shutters - Calculation of thermal transmittance

Persons responsible for contact with customers

Szymon Firląg, sfirlag@nape.pl, tel. 22 505-47-46