TOPURE

Please note: As paper frame is not strong and flexible and may looks like not square when you received after delivery by post courier. But it is ok if you use aluminium foil tape to seal the filter and ventilation system case. If you are not happy about it, please don't buy it. This high quality F8 filter Size: 288x288x150mm This is alternative cartridge for below Smartvent Systems:(not original product) SV02S SVO4 SVO4S SVO6 SVO6s It is made in a factory located in Shanghai China who produced air ventilation filter for many years. This filter works both sides and doesn't need pay attention on air flow direction during installation. We also have alternative F8 filter for HRV system,please check our other listings.