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Meta description: BYKO delivers three Passivhaus homes in Tordera certified by Praxis: Zehnder heat recovery ventilation, aerothermal DHW, ETICS and 2D timber modules.

Mechanical ventilation with heat recovery (or MVHR) is a key component of passive houses. This type of system consists of a ventilation unit with a heat exchanger, which transfers the energy from the air being taken out of the house

We know that a deep energy retrofits can be delicate, so the question often arises: what tools can I use for the hygrothermal analysis of potential moisture damage?

As the demand for energy-efficient buildings continues to grow, the retrofit of existing buildings to meet modern efficiency standards has become increasingly important.

A real tree which we then take to the recycling centre? A real tree, but potted, which we could then re-use every year. Or a plastic tree which we could re-use for several years.

I’ve worked on Passivhaus projects for more than a decade now, based here in Catalonia, north-east Spain. I came across the standard when I was doing a Masters in Architecture, Energy and Environmental studies at Centre for Alternative Technology in Wales (UK).

At Praxis Resilient Buildings, we conducted a detailed thermodynamic simulation to evaluate the summer performance of a multi-storey healthcare building.

We’re thrilled to announce that two projects we’ve been deeply involved in—Mirador de Gracia in Barcelona and Guacamayas in Puerto Madero, Colombia—have taken home top honours in this year’s Green Solutions Awards 2024–2025.

Sustainability is set to take on a more prominent role in Spain’s building regulations. The upcoming revision of the Código Técnico de la Edificación (CTE).

Praxis Resilient Buildings conducted an advanced thermodynamic simulation study to assess and improve the thermal performance of the new sports hall in Vila-seca.

As climate change intensifies summer heatwaves, ensuring thermal comfort in educational buildings is becoming a top priority

Noise pollution is an often-overlooked environmental hazard that has significant health implications.

Passivhaus buildings are often marketed as requiring no heating at all, but this is misleading. While it is true that Passivhaus buildings achieve an impressive 70% reduction in space heating demand compared to conventional buildings

Stairwell pressurization systems are a fundamental component of fire safety in tertiary buildings.

Mirador de Gracia, located in Barcelona, Spain, is the first Passivhaus certified care home in Catalonia,making itone of the most comfortable and energy-efficient care homes in the country. 

A Blower Door test is used to measure the airtightness of a building by quantifying its air leakage. The test involves using a large fan, temporarily mounted in an exterior doorway or other such opening, to either pressurize or depressurize the building.

Wow! A Passivhaus that consumes less than predicted by the PHPP!. Olloki is a single-family home in Navarra, northern Spain, which I recently certified to Passivhaus Plus standard.

The Passivhaus Planning Package (PHPP) is an energy modelling and certification tool developed by the Passivhaus Institute in Germany. Used worldwide for the planning, design, and verification of Passivhaus buildings, the PHPP provides an accurate and accessible way for professionals to model energy performance.