HRV PHOENIX 3 filter pack (Plastic Box) Compatible Generation 2 F8PHOENIX 3 X HRV compatible filters. 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 HRV VENTILATION SYSTEM FILTERS compatible with post 2014 HRV systems Product information High Efficiency Grade F8 EU7 Filter class EN779 Eurovent 4 4 Performance data based on ASHRAE 52. 2.