Ventilation filter HRV PHOENIX 3 filter pack (Plastic Box) Compatible Generation 2 F8 Deep PleatPHOENIX 3 X HRV compatible filter. Media is Lofted synthetic polypropylene with an extended deep pleated surface which allows for more media surface area, resulting in excellent dust loading capacities and long lifespan. Twice the lifespan than mini pleat media Product information High Efficiency Grade F8 EU7 Filter class EN779 Eurovent 4 4 Performance data based on ASHRAE 52. 2. 1992 Compatible with: HRV System ( Plastic box type) 300mm height 295mm