The solution for measurably
clean and cool city air

This is how it looks


The patented basic product

The CityTree is a mobile and intelligent biological air filter for insides and outsides. The innovative construction – with or without a bench – uniquely combines the natural abilities of air-purifying mosses with cutting-edge IoT technology.


Individual enhancements

The CityTree is fully functional straight away in its standard variant. On top of that you can add configuration packages to suit your location and usage scenario. These allow you utilise the CityTree’s many features to the full.


Additional services that meet your needs

In order to keep your investment for installation, maintenance and configuration of the CityTree to a minimum, we support you with specific services which can also be ordered individually.


The perfect combination
of plants and IoT


The intelligent air filter for cities

The CityTree has a floor space of 3.5m2 including a bench, or in the slim-line version only 1 m².

Moss for clean and cool air

Moss protected by plant coverage binds particulate matter, nitrogen oxides and CO2e and produces valuable oxygen. At the same time it cools the surrounding air.

Cutting-edge IoT technology

Integrated IoT technology collects, analyses and visualises data about the status and environmental performance of the CityTree.

Optimum watering

Thanks to a fully automated provision of water and nutrients using a built-in tank, the CityTree is watered independently.

Self-sufficient energy provision

Installed solar panels generate energy for operating the CityTree, and this energy is stored in batteries.

Various designs

With benches available in a range of different woods, and various colour options for the outer casing, the CityTree harmonises with any urban environment.

Environmentally-friendly construction

The CityTree is made of a high proportion of recyclable materials, has a long life and can be assembled or dismantled within 8 hours.


As a space-saving addition to natural urban greenery, the CityTree binds harmful particulate matter, nitrogen oxides and CO2, matching the enormous environmental benefits of up to 275 urban trees.


You can enhance the CityTree by choosing individually from a range of extras. This ensures independent energy and water provision as well as reliable protection against damage. Design and communication options are available, additional sensors collect and visualise data on the CityTree’s performance and on environmental factors.


Additional services
as required

Green City Solutions supports all customers with specific services related to the CityTree. If required we can find the right location for you and take care of the complete approval process in advance. We can also handle the CityTree’s care and maintenance services, and offer help with implementing marketing measures.

Service 1

Location analysis

Using the established CFD method (computational fluid dynamics) we determine the wind flow conditions and thereby the location that will allow the CityTree to perform at its best.

Service 2

Approval management

Thanks to our experience we are able to efficiently handle all necessary approval steps, from application to presentation. We can also – as far as possible – communicate with the authorities.

Service 3


For marketing measures at the CityTree we provide both content and design and are responsible for production. For example sheet design, implementation of content for the screen or NFC/iBeacon and Wi-Fi management.

Service 4

Care and maintenance

We take care of the technical maintenance of the CityTree and care for the plants. We also ensure that things run smoothly when the CityTree is moved to a new location and take care of appropriate disposal at the end of the product lifecycle.