Antimicrobial foam gaskets for sealing of air conditioning plants

The Institute for Air Hygiene (ILH Berlin) has tested the foam seals Fermapor® K31-A-9020-17F and K31-A-9308-5-VP5-F as well as the potting product Fermadur®-A-196- 4F with regard to their resistance to fungi and bacteria according to DIN EN ISO 846 (Evaluation of the action of microorganisms on plastics). They are developed by Sonderhoff especially for sealing or potting of filters used in air conditioning systems. The test results show that the sealing and potting material from Sonderhoff does not serve as a nutrient source for microorganisms. Special additives in the material formulation of the antimicrobial foam seals Fermapor® K31 effectively protect the sealings of climate-technical components for air distribution, such as ventilation grilles, air filter, nebulizer and access locks, against attack by harmful microorganisms.

The heating, ventilation and air conditioning manufacturers demand for their sealings and especially for the sealing and bonding of air filters special requirements in order to meet the hygiene requirements for HVAC systems according to VDI 6022. In particular air filters of these plants, which are to improve the climatic conditions of interiors, are often the cause of contamination of indoor air. Because accumulation of microorganisms on air filters is the cause of potent allergy risks when such contaminated air is inhaled by humans and animals. Especially at increasing temperatures, the concentration of microorganisms significantly increases and the fungal spores develop a higher vitality. Such conditions are a fertile breeding ground for germs which can cause infections in humans.

Air conditioning systems need to be serviced regularly in order to work properly and ensure a good indoor climate. Here, among other things, the leakage-free seat of air filters is checked which is provided by perfect foam sealings and in optimal cases with an antimicrobial protection.

Printed on 2018-11-17