Due to an ongoing remodel at my house Upstate I’ll no longer be able to vent outside and have found a great source for cyclone and other pleated type cartridges, just thought I’d mention.
12.74" OD x 8.375" ID x 26"L / Nanofiber / MERV 15 / 226 sq ft media / open both ends - $96.96
https://www.industrialcartridgefilters.com/Clark+Filters+NF20009.html
12.74" OD x 8.375" ID x 30"L / Nanofiber / MERV 15 / 260 sq ft media / open both ends - $103.36
https://www.industrialcartridgefilte...s+NF20011.html
12.74" OD x 8.375" ID x 39"L / Nanofiber / MERV 15 / 340 sq ft media / 14" x 16" flange - $184.32
https://www.industrialcartridgefilte...s+NF40005.html
Shipping is pretty reasonable with these guys as well, $23 for the NF2011 I just ordered. If I find it drags the airflow too much, I’d be cheap enough to add a second in a stacked configuration.
Cross-reference for Donaldson Torit replacement sizes here: https://camfilapc.com/retrofit-filters/donaldson-torit/
Spun-bond Nanofilter replacement part numbers begin with “NF”.