MERV-13 fabric, cut into two disks (~35 cm diameter) and one long rectangle (16 cm by 110 cm).
Computer fan—I got a be quiet BL047.
Cheap plug-in 12V power supply
Hot glue
Instructions:
Splice the computer fan to the power supply. When you look at the 3-pin fan connector straight on and put the bumps on the connector on the bottom, the wire on the right is ground and the wire in the middle is 12V. Do this first so you are absolutely sure which way the fan blows before you hot glue it.
Hot glue the long edge of the rectangle to the edge of one disc. The goal is to start a short cylinder (to be completed once you put on the second disc). Use plenty of glue on the spots where you have to pleat the fabric to get it to conform.
Place the fan centered on the seam of the long rectangle (the side of the cylinder), oriented to blow inwards, and tack it down with some hot glue. Then cut away a circular hole for the air to get in and hot glue the circular housing around the fan blade to the fabric.
Hot glue the other disk on top to complete the cylinder.
Charlie’s easy and cheap home air filter design.
Ingredients:
MERV-13 fabric, cut into two disks (~35 cm diameter) and one long rectangle (16 cm by 110 cm).
Computer fan—I got a be quiet BL047.
Cheap plug-in 12V power supply
Hot glue
Instructions:
Splice the computer fan to the power supply. When you look at the 3-pin fan connector straight on and put the bumps on the connector on the bottom, the wire on the right is ground and the wire in the middle is 12V. Do this first so you are absolutely sure which way the fan blows before you hot glue it.
Hot glue the long edge of the rectangle to the edge of one disc. The goal is to start a short cylinder (to be completed once you put on the second disc). Use plenty of glue on the spots where you have to pleat the fabric to get it to conform.
Place the fan centered on the seam of the long rectangle (the side of the cylinder), oriented to blow inwards, and tack it down with some hot glue. Then cut away a circular hole for the air to get in and hot glue the circular housing around the fan blade to the fabric.
Hot glue the other disk on top to complete the cylinder.
Power on and enjoy.