FatMarty
Well-Known Member
Thanks Bro.That custom exhaust muffler looks pretty tricked out. Can you please provide some insight to what you have there, unless it is a company secret that you are in the process of getting patented. (?)
I haven't installed this one yet as I'm a lazy bum.
However I do have a pic of the Intake model I made for my 1000 Watt HID hood.
The only difference between the 'Intake' and 'Exhaust' is mounting direction in grow room.
That part was a trade secret up til now.
I use 6" ducting in and out of these and using 6" starters to mount to makes it easy to install and service.
Basically you got a Honeywell fan, a 5 gallon bucket and lid, a couple 6" starters, a flower pot base, and some 1/2" neoprene copper pipe insulation.
You use GOOD Silicone II made by GE, and self-tapping sheet metal screws, (and maybe some rivets for the flower pot base), to put it together.
The model of fan used is Honeywell TurboForce 9 in. Tabletop Fan
Model # HT-900
They sell them at Home Depot and Lowes, etc.
First Step is measure and mark your bucket, lid, and flower pot/base for the correct diamer holes.
In the center of the bottom of the 5-gallon bucket mark a 9" diameter circle.
In the center of both the bucket lid, and the flower pot/base/, mark a 6 1/4" circle.
Second Step is to cut out the inside of the circles you marked on the bucket, lid, and flower pot/base.
A jigsaw works well here if you first drill a 3/8" inside the circle close to the marking to slip blade into.
A tube of Silicone II is shown on the cut out bucket above.
This product comes in those little squeeze tubes as well.
It is vital that you use pure silicone on your glued on pieces as it does not deteriorate over time like other types of adhesive sealants.
I bought a cheap flower pot and it cracked on me when I tried to jam oversized drain line into it.
So if you are going to be tweaking it get a thicker flower pot or base to work with.
I included the broken in one of the later images so you can see what it did.
Step Three for me is to fix my fuckup and cut a 6 3/8" diameter hole in the thick flower base I selected as a replacement.
For you step three is gluing, and/or riveting, the flower pot/base to the bottom of the bucket.
Step Four we need to take the base off of the fan itself so it will fit in bucket.
Pry the little plastic caps off the end of the mounts and the screws are exposed.
There some screws, some little ball bearings, springs, and more screws, on each side.
Remove all that junk and the base will be free.
The middle image above shows where I went anal and rewired the fan plug to fit the plug through the bucket in a smaller hole than the plug requires.
It's a hassle and not worth it for most folks: drill or cut a suitably sized hole in the side of the bucket once the fan is inside it.
First we need to add insulation to edge of fan though.
Step Five is where I take a length of 1/2" copper pipe insulation that has sticky stuff on the edges, and then I attache it the outside diameter of fan as shown below.
The insulation makes for a tight fit without warping the fan body, etc., and greatly reduces ambient noise from the finished device.
Step Six is to test fit the fan inside the bucket making sure not to orient it like the third image above shows.
Next cut a hole suitable for the electrical plug to fit through in the side of the bucket behind where the fan mounts.
Step Seven push the fan down into the bucket and pull the electrical through the hole.
Make sure the neoprene insulation is fitted snugly against the remainder of the bucket bottom to insure a good seal.
Step Eight is shown in the third image above where you drive three or four sheet metal screws through the side of the bucket and into the plastic side of the fan.
In the first image of the three above you can see a screw sticking through at 7 o'clock if you look close.
In the third image a sheet metal screw is visible on the side of the bucket.
Just make sure the screws aren't too long here or they will hit the fan blade.
1" self tappers work great. Make sure the fan is level with the bucket end before attaching screws.
Step Nine is to test the fan to make sure you did not warp or bind it in anyway.
It should run free and quiet.
I run mine on low or medium depending upon application - never run on high as it designed for quiet not volume.
Step Ten is rivet/glue on your 6" vent starter rings.
Obviously the silicone needs to set up for a day to insure long term integrity.
You would also want to plug the hole around the electrical cord with neoprene and/or silicone.
In the first image above you can see the shattered plastic of the first flower pot I tried to use.
I am using some heavy duty flex made for drains for my output vent pipe; so I needed a strong base to support the glued on tubing.
You can expect several hundred cfm with this setup; the precise amount depends upon fan setting of course.
I have cooled my 1000 watt enclosed HID hood with one for years now.
The effenciency and quietness leave me sold on the design for my 1600 watt bloom room application.
I bought the stuff I needed for this from Home Depot for about $25.
The fan is $15, and the rest is cheap.
Don't let the cheapness scare you - this thing is perfect for many small growers.