Grobud was the first company in Poland to obtain the prestigious certification from the Passive House Institute (PHI) in Darmstadt.
Designed for modern passive house construction
In today’s world, where energy efficiency and environmental responsibility are key priorities, the demand for innovative solutions in construction is more important than ever. With energy and heating prices rapidly increasing, technologies that reduce heat loss and energy consumption have become a particularly smart investment.
Anticipating these needs, Grobud launched its passive window production line in 2015. Since 2016, both the GRB PASSIVE windows and the production process itself have been certified by the renowned Passive House Institute (PHI) in Darmstadt.
Advanced Technological Solutions
The GRB PASSIVE line is the result of cutting-edge engineering and materials, making it ideal for low-energy (NF40) and passive house (NF15) buildings. The PHI Darmstadt certification confirms the system’s compliance with the highest standards of energy performance and product quality.
Growing Popularity Across the EU
Thanks to its PHI certification, Grobud’s GRB PASSIVE windows are gaining increasing popularity not only in Poland, but also across Europe. Recognized in countries such as Germany, Luxembourg, Austria, and Switzerland, the system has become a benchmark for energy efficiency and sustainable building solutions.
“Foam inside” – improved thermal insulation achieved by filling the profile chambers with polyurethane foam after the welding process.
Technical Specifications of GRB PASSIVE Windows
Profile Construction
GRB PASSIVE windows feature an advanced 6-chamber profile system, with specialized insulating inserts that ensure outstanding thermal performance. The installation depth of 85 mm (frame and sash) provides a robust and stable structure.
Thermal Insulation
Equipped with a triple-glazed unit (Ug = 0.5 W/m²K) and a Swisspacer warm edge spacer, the system delivers exceptional thermal insulation, minimizing heat loss and supporting energy-efficient building concepts.
Innovative Solutions
The GRB PASSIVE system includes three sealing gaskets, a durable aluminum handle, groove insulation, a dedicated sub-sill profile, and Powerdur Inside reinforcement – an innovative solution that replaces traditional steel reinforcements, enhancing performance while reducing thermal bridging.
Aesthetics Meets Functionality
Designed with both performance and appearance in mind, GRB PASSIVE windows are not only highly functional but also visually refined, meeting the expectations of the most demanding clients.
Invest in the future today – choose GRB PASSIVE passive windows, certified by PHI Darmstadt, a symbol of innovation and energy efficiency.
