Issue link: https://maltatoday.uberflip.com/i/1527280
26 | Architecture & Design Passivhaus: A Gold Standard for Energy Efficiency At the heart of Karl Camilleri's vision for sustainable architecture is the Passivhaus standard, a rigorous energy-efficiency certification that has gained worldwide recognition for its ability to drastically reduce energy consumption in buildings. Passivhaus, which originated in Germany in the 1990s, focuses on minimisng a building's energy requirements for heating and cooling by creating airtight, well- insulated structures that rely on passive design principles. These principles include: • Excellent Insulation: Keeping heat inside during the winter and out during the summer. • Airtight Construction: Ensuring minimal air leakage, which improves energy efficiency. • High-Performance Windows and Doors: Using high-quality glazing to reduce energy loss. • Mechanical Ventilation with Heat Recovery (MVHR): Maintaining excellent indoor air quality by continuously circulating fresh air without losing heat. • Thermal Bridge-Free Design: Eliminating any weak points in the building envelope where heat could escape. These elements combine to create buildings that require minimal energy for heating or cooling—so much so that in some climates, a Passivhaus may need only a small supplementary heater to stay warm in winter. Certified Passivhaus buildings typically consume up to 75% less energy than conventionally built structures. Camilleri is convinced that the Passivhaus approach can be a game-changer in Malta, particularly as the country grapples with its reliance on imported fossil fuels. He explains: "Passivhaus can help Malta reduce its reliance on imported fossil fuels and increase energy security." By optimising energy efficiency, these buildings not only reduce operational costs but also increase property value—a crucial factor for developers. Common Misconceptions About Passivhaus One of the most common misconceptions about Passivhaus is its perceived high costs. Camilleri explains that while the upfront expenses may be slightly higher, the long-term savings in energy bills often outweigh the initial investment. "Over the course of its lifespan, a Passivhaus building will recoup the initial investment and more, making it an efficient and affordable building standard." Passivhaus structures are designed with durability in mind. The focus on airtightness, proper ventilation, and thermal bridge-free construction results in buildings that are less prone to condensation and dampness, which often lead to structural issues. This " The most sustainable decision is not to build at all. But when we do build, our focus must be on creating spaces that seamlessly integrate energy efficiency, functionality, and aesthetics. Sustainable design isn't just about ticking boxes; it's about crafting environments that enhance well-being while reducing our ecological footprint. UK Passivhaus Trust Awards Finalist, Devon Passivhaus in Exeter Architects: McLean Quinlan Photo Credits: © Jim Stephenson