| C2C Certified® Bronze - Metal Premium Infills Certificate | | pdf | 134,48 kB | 1 page | en | |
| C2C Certified® Bronze - Mineral Fibre Ceiling Tiles Certificate | | pdf | 134,31 kB | 1 page | en | |
| C2C Certified® Gold - HERADESIGN One layer acoustic ceilings Certificate | | pdf | 158,49 kB | 1 page | en | |
| C2C Certified® Silver - Metal Tiles & Panels Certificate | | pdf | 125,8 kB | 1 page | en | |
| C2C Certified® Silver - HERADESIGN Alpha Certificate | | pdf | 158,94 kB | 1 page | en | |
| C2C Certified® Silver - Knauf Ceiling Solutions Suspension System & Accessories Certificate | | pdf | 419,5 kB | 2 pages | en | |
| C2C Certified® Silver - Mesh Tiles & Panels Certificate | | pdf | 134,56 kB | 1 page | en | |