Supplier: Hvac products and systems. hvac parts, original spare parts. we produce and sell hvac air filters, fan coil filters, pre filters, nanofiber filters, nanofiber window membranes, synthetic fiber roll filters, carbon filters, polyurethane filters. our products are produced by the american nelson lab. and and germany is tuv approved. nanofiber products have been produced as a result of more than 20 years of research. we produce unique products. we ship worldwide. our main products >pre filters iso16890 and en779 >fan coil filters nanofiber, synthetic fiber, polyurethane media filters are used. all of our products are aluminum framed. washable. >nanofiber filters it is included in the pre filter class. the efficiency class is iso epm 2.5 filters and epm 1.0 filters.