Groke Türen: Energy Efficiency through Smart Design

Improved Energy Performance

Energy efficiency continues to grow in importance — and rightly so, in our opinion. That’s why, for many years, we’ve focused on multiple all-around sealing levels in the development of our doors. Only a truly airtight door protects you from cold and noise, reduces heating costs in winter, and supports energy-efficient living through smart design. To help you improve your home’s energy performance, the KfW offers financial subsidies for renovation measures.

Product Features

  • Proprietary Profile Systems: In-house developed aluminum profile systems with 90 mm installation depth and up to 3 mm material thickness for maximum stability and durability.
  • Sealing Technology: Three continuous sealing levels ensure high resistance to wind and weather while reducing heating costs.
  • Climate Chamber Tests: Thermographic testing from -30 °C to +100 °C guarantees extreme durability.
  • Emission Testing: Test reports from the Eco Institute confirm low TVOC and formaldehyde emissions.

Sustainable Production

  • Eco-Friendly Powder Coating: Heat recovery and a closed water cycle reduce both energy and water consumption.
  • Solar Power System: PV system in Hagenbach with a total capacity of 855 kWp.

Eco-Friendly Powder Coating

Powder coating, known for its aesthetic and environmentally friendly properties, increasingly focuses on sustainability. By integrating heat recovery systems, the heat generated during the coating process is captured and fed back into production. At the same time, water is purified through evaporation and reused in a closed-loop system. These sustainable practices not only reduce energy consumption but also minimize water usage, enhance resource efficiency, and contribute to environmentally responsible production processes.

QNG Certification

Groke aluminum entrance doors stand for quality, modern design, and high security – and they meet the requirements of the QNG seal for sustainable building. This makes them an active contributor to environmentally conscious construction.

The QNG seal, issued by the German Federal Ministry for Housing, Urban Development and Building, is a prerequisite for the Federal Funding for Efficient Buildings (BEG) program and certifies ecological, economic, and social sustainability.

Advantages of QNG-compliant Groke entrance doors:

  • Use of environmentally friendly materials
  • Durability and low maintenance
  • Energy efficiency through excellent insulation values
  • Contribution to healthy indoor environments (e.g., low-emission materials)

Planners, architects, and builders can thus specifically focus on eligibility for funding and sustainability.

Sustainable building begins at the front door – with Groke.

Environmental Product Declaration (EPD)

The new Environmental Product Declaration (EPD) for aluminum exterior doors by Groke Türen GmbH documents all relevant environmental impacts throughout the entire life cycle – from raw material extraction to disposal.

The document is based on the standards EN ISO 14025 and EN 15804+A2 and has been reviewed and verified by ift Rosenheim.