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I seem to remember that Mosquito built one similar to Jay Bates'. CL810 showed a furnace blower filter in my topic about the Corsi-Rosenthal filter box that he had sitting up on a shelf. When I look up the the airflow of the furnace blowers, my measurements and calculations seem to indicate that my box fan actually has a greater CFM than the theoretical airflow of a 2 ton blower motor. The volume I found online for HVAC blowers is 400 CFM per ton. Perhaps my methodology for computing the airflow is not accurate but the CFM of my filter box appears to move at least 800 CFM.
The nice thing about the cart approach is that not only can you use the top surface as a bench top but you can move it near the source of dust as you are working. I considered that for my C-R filter box but floor space is at a premium in my shop so I decided to hang it hear my minisplit to ensure that its intake air was mostly recently filtered. That seems to be working because the filter on my minisplit was barely dirty the last time I checked it.
The nice thing about the cart approach is that not only can you use the top surface as a bench top but you can move it near the source of dust as you are working. I considered that for my C-R filter box but floor space is at a premium in my shop so I decided to hang it hear my minisplit to ensure that its intake air was mostly recently filtered. That seems to be working because the filter on my minisplit was barely dirty the last time I checked it.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.
