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The Passive House Institute (PHI) is an independent research institute that has played an especially crucial role
in the development of the Passive House concept - the only internationally recognised, performance-based energy standard in construction. Learn more about the Institute and its work.

Passive House Days


International Passive House Conference 2016 in Darmstadt

Big anniversary for the International Passive House Conference: from 22 to
23 April 2016 this central event for energy efficient construction will take place for the twentieth time running. A special focus of the programme will be on cost-effective ventilation systems. The conference takes place in Darmstadt – the city in Germany, in which the first Passive House was constructed in 1991 and where the first international experts' conference on this subject was held five years later. More information:

Passive House Days


"Active for more comfort" - Passive House brochure as online flipbook

How does a Passive House work? Which requirements exist with regard to components, planning, design, and project implementation? What is it like to live in a Passive House, what has already been built, and why are Passive Houses such an attractive investment? In order to competently answer such questions, the International Passive House Association (iPHA) has created the informational brochure "Active for more comfort". A new edition of this brochure is now available as an online flipbook.

Passive House Days


Designing sustainable buildings made fun: PHPP 9 now available

The tried and tested PHPP tool for designing energy efficient buildings is available in a brand-new version. This upgrade not only allows reliable calculation of the energy demand in accordance with internationally applicable criteria. It takes into account energy generation on or near the building as well. The new features also include innovative options, for example for heat recovery from shower water or for profitability calculations. The practical use of the tool is facilitated by means of automatic verification and plausibility checks. more

Passive House Days


World's first Passive House Premium now certified

One of the world's most sustainable buildings stands in Bavaria: as the first of its kind, a mixed residential and commercial project in the town of Kaufbeuren has met the criteria for a Passive House Premium certification. With a heating demand of only 8 kWh/m²a, it is uniquely energy efficient. At the same time, a 250 m² photovoltaic system on the roof produces renewable energy. The doors of this new building were open to the public on 14 and 15 November within the framework of the international Passive House Days 2015. more

Passive House Days


World's largest building retrofitted to EnerPHit Standard now certified

A completely modernized university building in Innsbruck, Austria demonstrates the energy saving potential available with refurbishments. Through integrated planning, the heating demand of the building was reduced from 180 kWh/m²a to just 21 kWh/m²a. The project thus meets the criteria of the EnerPHit Standard for retrofits with Passive House components – this standard, introduced by the Passive House Institute, is specially tailored to the particularities of retrofit projects. The certificate was presented at the official reopening. more

Passive House Days


Component Award announced for ventilation in residential buildings

Ventilation with heat recovery is absolutely essential in energy efficient construction. The application of such systems in practice often fails due to high costs, though. In order to promote low-cost approaches which can facilitate the breakthrough of this key technology in the mass market, the Passive House Institute has announced the Component Award 2016 for ventilation solutions for residential buildings. All-inclusive concepts are being sought for an existing building, which are not only highly energy efficient but also economical. more

Passive House Days


Mobile student dorm in Passive House Standard inaugurated

Adaptable housing space is scarce in many cities around the world. Even more so when affordability is decisive. A solution now presented in Vienna could set a precedent: a mobile student dorm. The building consisting of prefabricated residential units can be set up within a few days, for example on plots that are temporarily not in use. The project doesn't just facilitate low rents, it has also achieved the Passive House Standard. And the system could be used in other ways as well – for example as sustainable accommodation for refugees. more

Passive House Days


Monitoring confirms energy efficiency of Passive House city district

The Passive House district of Bahnstadt in Heidelberg (Germany) has passed the test: according to a report on recent measurements, the values being strived for in relation to energy efficiency were met in full. In 2014, the average consumption of 1260 housing units with a living area of more than 75 000 m² was 14.9 kWh/(m²a). The statistically high number of projects built by different property developers and architects convincingly shows that a successful large- scale implementation of the Passive House Standard is possible. more

Passive House Days


New Passive House Classes presented at conference in Vancouver

Clearly-defined criteria for combining the international Passive House Standard with renewable energy sources are now applicable: the Passive House Institute's new guidelines for building evaluation have come into effect with the introduction of a new version of the planning tool PHPP at the NAPHN15 Conference in Vancouver. Not only is certification according to the Passive House Classes Plus and Premium now possible worldwide, but the EnerPHit criteria for retrofits are also now applicable in all climates. more

Passive House Days


First multi-unit residential building certified to Passive House Plus

The combination of energy efficiency and renewables is the future-proof solution for all buildings, including multi-storey projects – this is demonstrated with a new build in Innsbruck, Austria: the apartment complex is the first of its kind to be certified as a Passive House Plus building. This concept is not just based on a theoretical annual energy balance, which is misleading in practice; instead, the actual amount of regionally and seasonally available renewable energy is taken into account. more

Passive House Days


New architecture book presents "Passive House Award" winners

A new book showcasing the winners and finalists of the international "Passive House Award" shows that energy efficient construction is not only profitable, it is also an enrichment for architecture. The book is available in a bound version and in digital form as an online flipbook. All of the award-winning buildings are presented with many photographs and illustrations. Technical details which are relevant for the energy balance are also explained in detail. In addition to the book, there is a poster exhibition on the Award. more

Passive House Days


New designPH takes Passive House planning to a whole new level

Passive House planning has never been more convenient. The new designPH, a 3D model interface developed by the Passive House Institute, allows for graphic input of energy related design data. Details relating to the thermal building envelope and shading are entered automatically and can be optimised if necessary. The treated floor area can be gradually refined in order to simplify the design process. The results can be exported into the Passive House Planning Package (PHPP) with just a few clicks. more / order now

Passive House Days


Passive House Conference: Solutions for a sustainable energy future

The Passive House Standard enables every building owner to benefit from the energy revolution, with certified components ensuring cost-effectiveness. This basic concept was the focus of the International Passive House Conference, held from 17 to 18 April 2015 in Leipzig. Speakers from all over the world presented exemplary projects and solutions for building systems, ventilation units and windows. An exhibition provided specific examples of products currently available on the market. Conference Review

Passive House Days


EU-funded project supports development of tomorrow's construction tools

In order to close the "performance gap" that often occurs with energy-efficient buildings, 20 partners from across Europe have joined forces in the new Built2Spec project. The aim is to provide construction specialists with tools for mobile applications using smartphones and tablet computers – from easy-to- use 3D visualisation and compact solutions for airtightness measurements to a BIM-based data platform for on-site quality assurance. The Passive House Institute is providing its expertise on energy efficiency in this project. more



Passive House also provides answer to energy efficiency in the tropics

Whether in India, Singapore or Brazil – Passive House principles also work in tropical climates. The focus, however, changes: while heating is typically not needed in these climates, efficient cooling and dehumidification methods play an important role. A new study by the Passive House Institute gives concrete design recommendations, showing that, in the Passive House of the tropics, energy demand is also drastically reduced. The entire study is now available online on the knowledge platform Passipedia (member area). more

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22 to 23 Apr 2016, Darmstadt
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13th Passive House Days
11 to 13 Nov 2016, worldwide
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Component Database

Passive House
Component Database
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New developments

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PHPP 9 (2015)
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Seals for Certified Passive House Components
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Passive House Classes,
Classic, Plus, Premium
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EnerPHit -
PHI certification for retrofits
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Wall plaque
for certified Passive Houses
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Press releases

Latest press releases

Research & Literature

Passive Houses for different climate zones

Retrofits with Passive House components -
EnerPHit Planner Handbook
(in German)


Passive House Retail Stores now out
Overview of contents
(in German)

PHI Literature

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