One data point: my father made a similar filter and was running it constantly. One night the fan inexplicably caught on fire, burned down the living room and al

One data point: my father made a similar filter and was running it constantly. One night the fan inexplicably caught on fire, burned down the living room and almost burned down the house. So either get good quality fan, or spend the money on ceritifed purifier that can run for long hours at a time.