Natural fences in the form of green walls in offices offer not only a kind of comfortable work zone, but also have a huge impact on improving the air quality in offices. Using the appropriate size of green wall modules, the leaf area reached approx. 40 m². Such a leaf surface guarantees a positive effect on significant air purification. In addition, the leaves of plants acting as high-efficiency filters purify the air from such harmful compounds as: formaldehyde, benzol and other harmful substances. In addition, in combination with an improved core acoustics, they solve the issue of a positive impact on room acoustics. Ecological green walls can be successfully treated as an investment that replaces three elements of office equipment: plants, classic walls dividing workplaces and elements of equipment affecting the acoustics.