Thread: small amount of noise reduction around DC

Are you going to vent it outside? (You really should).

I built a cabinet/room within the back of my garage / shed.

75mm wide studs from memory. Earthwool insulation.
1 layer of gyprock on the inside
1 layer of 12mm plywood (I think, could have been 15mm) on the outside.
Sealed gaps pretty extensively.

The air going into the dust pipes is louder than the DC itself.

I don't have to worry about any shared walls etc, just fussy neighbours.

You are welcome to come have a look and listen at some point if you want.

Originally Posted by havabeer69

. . . . . .my over all plan is to run the 6" ducting up into the roof and bring droppers down through the roof sheet where required. garage part of the roof has no insulation it either which is something I intend to do as well.

Putting trunk line ducting in a roof cavity and hoping for an easy install of an efficient system is a pipe dream.

Dropping down from a trunk line should not be simple T's but need to be done as Y branches and these take up considerable space. Inside a roof this then usually means Y'S laying down and then using 90º bends, Again these bends cannot be short radius so need to be long radius bends which take up space, or cutting ovals in the roof sheet ie triple time awkward
The rafters will continually be in the wrong spot resulting in kludge ducting or machine positioning compromises,
The blast gates should also to as close to the trunk line as possible so unless you get auto gates (ie $$) you'll need to come up with a remote activation method.

The best OH gates are rocker gates but they also consume vertical space whether they are auto or not.

If you decide to go with the "up in the roof" I would think and overplan everything very carefully and don't buy anything until your layout of fully sorted.

RE: Enclosure
12 / 15mm sheet is not heavy enough
You need something really thick and dense in there somewhere. Two layers of plaster board would be a cheap option.
I used 38mm melamine, 50 mm Rockwool and then 15mm chipboard on my enclosure.

My recommendation would be to NOT connect the DC enclosure to any of the house walls. Build a separate standard alone box with a 50 mm gap between the enclosure and the any house wall - stuff some Rockwool in there if you like to reduce dust collection and creepy crawly inhabitation.