Review on TREDY 4 Stage Purifier TD 1500 Replacement by Sean Purnomo

I change the filters every 3 months. I could probably run longer, but I don't want my air purifier picking up excessive dust because the filter is full. It's amazing to see all the dust going through these filters and there is no sign of residual dust at the bottom of my air purifier. I have 2 cars, one for the living room and open plan kitchen and the other in my bedroom. The best purifier and filter on the market.