Welcome to the updated Cyclone and Dust Collection Research web pages. My severe allergic reactions led to many bad bouts of pneumonia that cost me over half my respiratory capacity and left me unable to handle much dust exposure at all, including house dust. I have four dogs and a busy household that serves as the regular gathering place for our grown children, their friends, and our friends. As a result my home stays filled with constant dust problems. Unable to breathe, I was pretty motivated if not obsessed. My small air cleaner with fine filter worked and it inspired me to take one of my fine Donaldson Torit large 300 square foot cartridges and put on top of it a strong in-line duct fan. This worked far better in my home. Still, it took a day or more to bring down the particle counts to safe, plus a heavy load of people and pets stirred up the dust faster than it could bring the dust level down. My particle meter again showed this air cleaner kept cleaning the same air unless the HVAC system stirred the air.

Updates This system needed some changes. I flipped the blower upside down so instead of blowing into the filter, it sucks through the filter and blows out a strong stream of air. This let me put a swivel duct on top of the fan to direct that fast moving air stream. When aimed properly this airflow stirred all the air in my home. Even with a full load of people and pets stirring things up this new setup pulled the dust levels down to safe in about three hours then kept the air safe. I was so allergic that just a little dust would cause my nose to run and eyes to water, so that inspired me to upgrade to an even finer Wynn Environmental 300 square foot "Nano" filter. The result worked so well I was able to get rid of my smaller air cleaners. More importantly, as long as I ran this air cleaner I did not have to take the up to six breathing treatments a day to keep my airways open and I was able to finally start reducing my medications. Still, this did not fix the problem because if I turned off my air cleaner the home immediately went back to dangerously high particle counts.

Figuring out what was wrong took lots of particle counter testing. The particle counter showed my ceilings, walls, closets, cabinets and especially carpets were all contaminated. Just about any movement stirred up lots of dust. air purifier babyI had all vacuumed with my HEPA filtered vacuum, all deep cleaned including carpets, and had all walls and ceilings repainted. air cleaning plants tedMy air cleaner still had to run all the time. home air purifiers home depotMy particle counter showed the problem was my carpets. Even after having them deep cleaned, just walking around on the carpets launched unhealthy amounts of fine dust. Pulling up a corner of carpet showed huge amounts of dust accumulated below the carpet. With no other choice I had all the carpet pulled, everything well cleaned and then replaced almost all our carpet with tile.

This finally got my home clean enough that just a few hours of running air cleaner kept my allergy symptoms from returning. Building one of these air cleaners is easy, but the blower and filter are not cheap. Start with a big Wynn Environmental 9L300NANO "nano" filter. It sits gasket side down on a large square of tile or other flat surface. It is important that this air cleaner be centrally located so it can stir the most possible air. On top of the filter apply a ring of 3/4" thick 1" wide self adhesive foam insulation. On top of that just set at least a 700 CFM 8" in-line duct fan faced so it sucks through the filter and blows out the top. as shown on the right. On top of that place a swivel duct that lets you aim the airflow for maximum air stirring. In my large home my particle counters show it takes this air cleaner about 3 hours to pull the air down to safe. Cleaning is also easy. About once a month put on the dual cartridge respirator mask, lift the blower off the filter, slip a big plastic garbage bag over the filter to keep from spreading the accumulated dust on the filter, take the filter outside, then use a air compressor attached long wand or vacuum on blow attached to a right angle fitting.

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