We have literally spent YEARS trying to figure out an easy way to attach the diffuser for our evaporative coolers. It needed to be something that could quickly be taken down and put back up by one person with minimal or no tools since it would need to removed twice a year for cleaning, adding a baffle for winter, and removing it in the spring. We have had a dozen different ideas and spent so much time and money trying to figure out the best way. Of course everything was over engineered. You just hit the jack pot!
MATERIALS NEEDED
4- L hooks (#108) per cooler
Diffuser (mine measured 22"x 22")
TOOLS NEEDED
Drill motor
1/8" drill bit
5/32" drill bit
tape measure
marker or pencil
pliers
Saber Saw (may not be needed if you have an 18" duct)
Begin by measuring the size of the duct and determine where to drill the holes into the wood in relation to where the L hooks will be holding the diffuser. We have two ducts, each a different size.
The smaller duct (18") allows for the L hooks to attach from inside the diffuser, with placement at the end of the louver which prevents movement of the diffuser from side to side as shown above.
The larger duct (19.5") attached from the outside of the diffuser and needed slots cut for the hooks to line up with the wood in the ceiling, see above.
Once you have determined where to drill the holes (2 in back, 2 in front), mark the spot and drill the holes with the 1/8" bit as deep as the bit.
Then use the 5/32" bit and drill only as far as the unthreaded part of the hook will go, minus the amount of space from the ceiling to where the hook catches (about 1/4" for the diffusers we used).
Then screw the L hooks into the holes you just drilled, leaving enough space for the diffuser to clear the hooks (you may need to use the pliers).
Attach diffuser to hooks (so they are at right angles from the duct) on the side farthest from you
and then turn the hooks closest to you so they are parallel with the duct so the diffuser can be slipped past the hooks
and then turn the hooks 90 degrees to catch the diffuser and hold it in place (using pliers if needed).
If you need to cut slots to line up the proper holes, use a saber saw to make sequential cuts till slot is large enough for the hook.
I cut the slots near a reinforced area for strength.
Quick and easy job done!
