1. According to guideline No 20551/4-5-2020 of Ministry of Health, filters of air condition units must be cleaned extremely well with certified chemicals. If the filters must be replaced should be replaced immediately. Except the filters, air condition and the area around them should be also cleaned. Especially, ductworks should be robotically cleaned.
2. According to guideline No 5754/5-2-2020 of Region of Attica, all water tower of air condition units and also all these units at hospitals must be preventively screened (service). Great attention should be given at thoroughly cleaning of filters (or replacement) and at cleaning chemicals in order to avoid allergies and infections. The choice of these chemicals as also the final check of the cleanliness of the filters is recommended to be done in cooperation with the Hospital Infection Commission.
3. According to guideline No 20551/4-5-2020 of Ministry of Health, due to SARS–CoV–2, filters of air condition units should be replaced according to scheduled service. All services will be executed in compliance to protection measures (individual protection, ventilation of the room) included breathe protection.
4. European standard TR19/2013 of duct cleaning of restaurants.