CESB 2016 Praha Wednesday, 22.6.2016 by Marek Petrik VELUX Austria tools for design and assessment of buildings based on Active House method CESB 2016 Praha Wednesday, 22.6.2016 by Marek Petrik VELUX Austria

Agenda General intro Active House methodology Lichtactive house

Climate challanges According to the findings from the European Roadmap for a competitive low-carbon economy, the CO2 reduction in residential and services sectors has to be reduced with approximately 90% by 2050, as comparing to 1990 levels. Such needs and ambitions sets high requirement to the building sector and to reach such level all buildings by 2050 must have a CO2 emission of less than 3 kg/m2. The European Directive on Buildings sets ambitious requirement to existing and new buildings. Among others the directive introduce a requirement that all new buildings should be “Nearly Zero Energy Buildings” by 2020, as well as it requires that measures to improve further the energy performance of buildings should take into account climatic and local conditions as well as indoor climate environment and cost-effectiveness.

User behaviour sets energy use Stronger energy requirement do not save energy The energy requirement to A labelled buildings equal to 2015 requirement in Denmark do not have a significant lower energy requirement than B lapelled buildings, equal to 2008 requirement 4.029 A labelled buildings and 13.422 B labelled buildings were included in the study Level for the label Measured value Source: Kirsten Gram Hansen, Statens Byggeforskningsinstitut Grafic: Ingeniøren 2015 2008 However the directive do not require that the performance of the building is monitored or commissioned. Monitoring is important as earlier studies in Denmark shows that the actual energy performance of a building is very different from the calculated value. An analysis of the link between energy consumption and energy labels in single-family homes, in Denmark, shows that the real use of energy in “A” labeled houses and “B” labeled houses is almost equal. In order to meet the future ambitious requirement it is therefore necessary for architects, engineers and developers to have access to design and evaluation tools that in an easy, correct and cost optimal structure can show the holistic performance of the building and be used in dialog with their customers and the building owners.

Focus on energy and indoor comfort

Active House Vision - a balanced focus for design Active House is a vision of buildings that create healthier and more comfortable lives for their occupants without impacting negatively on the climate Comfort – creates a healthier and more comfortable life An Active House creates healthier and more comfortable indoor conditions for the occupants, ensuring a generous supply of daylight and fresh air. Materials used have a neutral impact on comfort and indoor climate. Energy – contributes positively to the energy balance of the building An Active House is energy efficient. All energy needed is supplied by renewable energy sources integrated in the building or from the nearby collective energy system and electricity grid. Environment – has a positive impact on the environment An Active House interacts positively with the environment through an optimised relationship with the local context, focused use of resources, and its overall environmental impact throughout its life cycle.

Active House Vision - Comfort – Energy - Environment

Active House Vision - Comfort – Energy - Environment

Active Radar - Comfort – Energy - Environment

Active House Radar - Calculated and measured performance

Active House Case - Sunlighthouse

Active House Case - Sunlighthouse – Calculated and measured use of energy Sunlighthouse is an on-site plus energy house And an on-site zero-carbon-emission house (calculate and evaluated).

Active House Case - Sunlighthouse – the indoor comfort levels by inhabitants The feeling of the residents in respect of room I (Ideal) II (Good) III (Acceptable) temperature was regarded as ”neutral” during 88% of the time. Calculations according to EN 15251 confirm that. Most of the time, the values are rated in the best category I.

Active House Case - Sunlighthouse – the indoor comfort levels by inhabitants The performance of comfort and energy use has been evaluated and compaired with the calculated value in the Active House radar. The lower value on indoor air quality is due to the mechanical ventilation system “only” deliver the needed air exchange during the heating period and is reduced to save energy. In summer the ventilation is established by natural ventilation and giving better CO2 levels, without use of energy.

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