Our high performance 4” thickness Passive exterior doors are the energy saver. The insulation professional for all low-energy and Passivhaus requirements, as certified by the Passivhaus Institute. This door product creates the best conditions for a more comfortable and healthy indoor climate thanks to its high level of thermal insulation, airtightness as a doorset and its sophisticated design. The flat steel stabilizer running lock side in the core is insulated, preventing thermal bridges and thus also preventing condensation problems. Our passive door guarantees the highest technical durability and achieves the best values in all performance classes according to EN 14351-1. It already meets the insulation values of tomorrow today and saves heating costs - a logical and profitable investment in the future.