If your enclosure/rack has intake/outake vents and at least one fan: get dust filters for the intake. "One piece" dust filters with big holes are suboptimal, they have a big negative impact on the cooling performance/"air throughput" and they let a lot of small dust through. Example for...
The air purifier also has a night mode that reduces the noise level and dims the LED lights, making it ideal for use in the bedroom or even an office. Just set it to automatic mode and let it adjust the fan speed based on the air quality in the room. Buy BISSELL® air280 M...