Radial fans (also known as squirrel cage blower, or visualize a water wheel from an old fashioned water driven flour mill) will move air more quietly than an ax

Radial fans (also known as squirrel cage blower, or visualize a water wheel from an old fashioned water driven flour mill) will move air more quietly than an axial fan in a box fan. Levoit on Amazon are some great, relatively inexpensive units and when the HEPA filter it comes with needs replacing I use use furnace filters cut down to size. If you want it to last a bit longer, you can use quilt batting as a pre-filter before the furnace filter to catch the big stuff and extend the life of the furnace filter.