US Navy

We have already done 2x a complete cleaning of HVAC system in all areas of the flagship of the 6th Fleet of US Navy - USS Mount Whitney in a dry dock in Croatia in 2011 and 2015. It was about 10km of ducts. Cleaning took place among a lot of other activities (on the ship were about 700 other workers), which put high demands on communication and work coordination.


We provided a unique cleaning service of the exhaust duct from the welding tables and robots without downtime. Only the workplace, from which we cleaned the ducts, was stopped.

AIDA Cruises

We cleaned exhausts from bathrooms, corridors and public areas on cruise ships AIDA Sol (2 200 passengers) and AIDA Cara (1 200 passengers). Work was carried out during dry dock in Germany during 6-7 days per ship.


Cleaning of industrial exhausts, hood and other machinery cleaning using dry ice blasting. In Nemak we realize part of cleaning during the summer shutdowns, some parts we are able (in cooperation with the customer) to clean during operation, without stopping production.

We work in multiple teams, due to the small time window, we have in the place at the time about 10-14 employees, several forklift platforms and several machines for dry ice blasting in combination with our robots for cleaning ducts and rotation brushes.

Institute of Hematology and Blood Transfusion in Prague

Here, due to the values of biological samples and measurements, it was necessary to clean within a short time the entire air-conditioning system in the inpatient department, including disinfection.

Mandarin Oriental Hotel Prague

For this luxury hotel we provide an annual cleaning service of exhausts from the laundry and from the kitchen, which is also partly in operation during the cleaning.


We clean kitchen exhaust duct from the Food court and other premises in the shopping centre in the center of Prague. After agreement with the administrator we provide also controls of other ventilation systems so as to comply with the prevention of fire hazard.

Continental Barum

In the Barum plant in Otrokovice we provide cleaning of technology with dry ice blasting during each downtime and as well cleaning the exhaust ducts from the technology, especially in the mixing department. Cleaning of exhausts is an important fire hazard prevention.

We clean annually sensitive technologies in clean premises of the company Zentiva in Prague. This is a relatively demanding operation because of high demands on hygiene and in general work in this area.


We provide periodical maintenance of kitchen exhaust.


Not far from Dresden, we conduct regular exhaust cleaning from NC machines, contaminant is oil emulsion.

For this case, we constructed special high-pressure inspection doors in the thick-walled ducts.

Toyoda Gosei

For the company Toyoda Gosei in the city of Klášterec nad Ohří we provide complex services from dry ice blasting equipment, dry ice deliveries to the complex cleaning of HVAC ducts in halls.

Cleaning runs out partly without downtime and with the combination of our technologies of dry ice blasting and hydraulic and pneumatic brushes.

Case Studies