Specifications
1)Framed primary-efficient filter,Air material 
2)General air conditioning systems 
3)Large dust holding capacity 
Specifications
1) panel filter, air filter, cardboard filter, pre filter, primary filter 
2) G2 / G3 / G4 
3) various frames 
Cardboard Filter
Purpose: panel pre filter can be used as pre filter of air purifying equipment .
Introduction: this kind of primary filter is made of 100% anti-wet synthetic fibers, surface covered with network, V-folded structure provides maximum filtrate area. Special process keeps the shape.
Features: large filtering area, low initial resistance, high air flow, large dust holding capacity, completely droppable.
Filter Media: Incremental structure of flame-retardant synthetic fiber filter media, conforming to the European DIN53438-F1 
Frame: Waterproofing chipboard, abandoned chipboard frame filters can be burned, no pollution, conforming to environmental requirements / metal frame also available. With unique design, it can be reused, reducing cost.