We set the classes according to:

• ДСТУ ЕN 14351-1 Windows and doors — Product standard, performance characteristics — Part 1: Windows and external pedestrian doorsets
• ДСТУ ЕN 14351-2 Windows and doors — Product standard, performance characteristics — Part 2: Internal pedestrian doorsets
• ДСТУ Б EN 12207 Windows and doors - Air permeability - Classification
• ДСТУ Б EN 12208 Windows and doors - Water tightness - Classification

We test windows and doors to national standards and European norms according to:

• ДСТУ Б EN 1026 Windows and doors - Air реemeabilitу - Test method
• ДСТУ Б EN 1027 Windows and doors - Watertightness -Test method
• and others

We carry out the calculations in accordance with:

• ДСТУ Б EN ISO 10077-1 Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 1: General
• ДСТУ Б EN ISO 10077-2 Thermal performance of windows, doors and shutters Calculation of thermal transmittance - Part 2: Numerical method for frames
• ДСТУ ЕN 673 Glass in building determination of thermal transmittance (U value). Calculation method