Simplest and easiest is a stand alone unit like the one below around $200-$250 for 800 square feet:

https://www.amazon.com/Colzer-Purifier-Filter-Spaces-Perfect/dp/B0897L9Y24/ref=sr_1_10

Watch the ongoing cost of filter replacement ($50 recommended to replace twice a year). The pre-filter net should be washable but these are recommended to be replaced as well about once a year.

We bought one with a built in Ozone generator to help removed the odor from the basement kitchenette refrigerator when the power went off and deer meat rotted. set in up in front of the fridge door, along with activated charcoal on the shelves. Did the trick. After that we leave it running in the basement for the dust and that clean outdoor smell. Too much Ozone is a pollutant, so watch the sizing of your unit if you do this.