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Energy efficiency of passive house exceeds all expectations

Two years’ monitoring of the performance of a certified passive house proves the building to be far more energy efficient than expected. An all-in-one ventilation and heating system from Nilan constitutes a vital parameter in the exceptional results, as it provides ventilation with heat recovery for space and sanitary hot water heating consuming very little energy.

First-passive-house-in-CZIn Jenišov in the Czech Republic, sits the country’s first-ever certified passive house, accredited by the German Passivhaus Institut, which is the organisation behind the energy efficiency and comfort building standard. Since the residents moved into the house in March 2010, it has been subject to monitoring in terms of its energy consumption. Now, two years later, data obtained from 1 April 2010 to 30 March 2012 prove that not only is the house in keeping with the stringent required maximum for its  total energy consumption at 113 kWh/(m2a), it consumes a mere total of 48 kWh/(m2a).

This means that the house provides the residents with much more than what they hoped for when investing in a passive house – not least taking into consideration that Jenišov is known for its relatively cold climate:

– Living in a passive house has not only given us massive savings on the heating bill, we are also able to enjoy a healthy and comfortable indoor climate at all times of the year, without ever having to rely on natural ventilation, says home owner Martin Šperl.

Ventilation and heating solution consuming only 20 kWh/(m2a)

The passive house standard is a relatively new concept, yet widely expanding internationally, offering constructors and home owners the possibility of building homes that consume only a minimum of energy.

One of the largest items in the energy consumption equation of a passive house, and thus a key factor when reducing the total as much as possible, is the ventilation and heating solutions. In the Jenišov house, these are combined in a single unit, the Nilan VP 18 10 P, which is the predecessor to Nilan’s all-in-one Compact P solution.

Consuming a mere 20 kWh/(m2a), the unit provides balanced ventilation with active and passive heat recovery for space heating and sanitary hot water production, supplemented only by underground pipes and a 2 kW heating element on the very coldest days of the year. The energy consumption of the house in general and the Nilan solution in particular are deemed more than satisfactory by Nilan Key Account Manager Sabrina Arnautovic:

– These figures prove that the passive house standard and our solutions are a perfect match and a sound investment, achieving optimal performance even in quite cold climates. Furthermore, obtaining a passive house certification and topping it with data proving the house to perform even better than expected paves the way for many more passive houses, and many home owners have already shown interest in the Compact P.

Learn more about the passive house concept

Learn more Nilans passive house certified Compact P, the newest generation of Nilans all-in-one solutions

See the technical specifications of the passive house in Jenišov

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