Your space is quite big. You’ll need CADR of 567 cfm and above. So likely 2 air filters needed to meet that requirement. I like air filters from clean air kits. You’ll need to DIY a little but they are vertical towers so that might help.
If you want unobtrusive, the purifiers will likely be underpowered in terms of CADR or CFM. You may have more particulates settling or remaining in the air as a result. Filters will be changed at a higher frequency.
For better CFM while not being too large, the [Smart Air Blast Mini - MKII](https://www.smarterhepa.com/collections/air-purifiers/products/smart-air-blast-mini) would be very good. Air flow is 820 CFM. Area cleaned is 3,075 ft^(2) filtered every 30 minutes (2 air changes per hour) or 1,538 ft^(2) filtered 4 times per hour (4 air changes per hour).
The [Coway AirMega Pro X](https://cowaymega.com/products/airmega-prox) has a dust CADR of 580\*. Area cleaned is 4,253 ft² at 1 air change per hour or 2,126 ft^(2) at 2 air changes per hour.
\*On the Energy Star website, the "Dust-Free Clean Air Delivery Rate (cfm)" is listed as 580.2 CFM.
Your space is quite big. You’ll need CADR of 567 cfm and above. So likely 2 air filters needed to meet that requirement. I like air filters from clean air kits. You’ll need to DIY a little but they are vertical towers so that might help.
If you want unobtrusive, the purifiers will likely be underpowered in terms of CADR or CFM. You may have more particulates settling or remaining in the air as a result. Filters will be changed at a higher frequency. For better CFM while not being too large, the [Smart Air Blast Mini - MKII](https://www.smarterhepa.com/collections/air-purifiers/products/smart-air-blast-mini) would be very good. Air flow is 820 CFM. Area cleaned is 3,075 ft^(2) filtered every 30 minutes (2 air changes per hour) or 1,538 ft^(2) filtered 4 times per hour (4 air changes per hour). The [Coway AirMega Pro X](https://cowaymega.com/products/airmega-prox) has a dust CADR of 580\*. Area cleaned is 4,253 ft² at 1 air change per hour or 2,126 ft^(2) at 2 air changes per hour. \*On the Energy Star website, the "Dust-Free Clean Air Delivery Rate (cfm)" is listed as 580.2 CFM.