Toroidal blades for a Honeywell fan. Adapted from Printables by lowering the hub (was rubbing in the middle), and to utilize the keyway on the hub - so no masking tape is needed to assemble!
There are 5 screws on the back of the cowl going around the fan. Remove those first. There is a metal ring in the center of the hub. I pried it out with a small flat head screwdriver, then removed with pliers.
New blades should slide right in.
If you aren't sure how to dissasemble, this video should help:
This is a really good time to clean and lubricate the fan as well!
