My RVK fan could be quieter but with the carbon filter its not really an issue as you have to LISTEN to hear it.

The problem is that where my RVK takes the air out is causing an ECHO. The echo is in a bad spot and needs to be dealt with a.s.a.p

The chances off anyone hearing the outtake is very slim. On the right day with no traffic or wind you can hear it right outside my back door(10-15ft away). I use my back door and not my front door so this is the door that everyone must use.

I'm pretty broke at the minute with the kids going back, a couple of B'days, saving for Xmas, etc

Any ideas to make it as quiet as possible without spending too much money. However if buying a silencer is the only way then that is what I will do.

Ideas that came to mind where: buying new ducting ( bigger, kind that you would find on the back of a dryer), Padding the outtake pipe ( could be bad for the fan if I do it too much though? )

Cheers for you help.

What kind of ducting are you using at the moment? I switched to the accoustic baffled stuff and it made an instant difference. Joolz has it and it no more expensive than B&Q charges for normal alu ducting. I think there's even a thread for homemade accoustic ducting floating around somewhere.

hey man,

I'm using just standard pipe you would buy at a hardware store. I put corners in the pipe thinking it would make it quieter.
The RVK is 125mm A1

Edit: Though about getting a fan controller but the fan outtake is just about right on full speed.

Its where the air is extracted too thats making the noise.

Will the acoustic ducting cure what ales me?

I'm not certain but I think either blaberblab or church had much the same problem, they solved it with a long cardboard chimney (of sorts) sticking out the top of the drobe (i'm pretty sure it was blab, the more I think about it).

The accoustic ducting is basically 2 lengths of ducting, one inside the other, with a layer of fluffy, itchy as fook insulating fibreglass type stuff, covered in foil. It cuts down that echoey whooshy noise of the air rushing through the standard ducting. It didn't silence it, but it made it do-able (the missus nearly pulled the plug in the first week due to the noise).

Check out blabs threads or send him a pm, I'm sure he'll help you without a second bounce

The noise mine makes isn't too bad... I can sleep through it (when I rarely sleep!)... Have thought about putting something to lessen it though, just not got round to it yet

morning folks !!

couldnt you wrap a old quilt or similar round the ducting for now till you have money to do a proper job?????

peppi

My exhaust was pretty noise, untill I taped on a 12in piece of ducting and wrapped it in a towel. That lowered noise levels for me, can't hear it outside my room.

I might try wrapping something around it to see if that has an effect.

Sounds like what you did DrTrichome is made a homemade silencer? Did you wrap just the end of the pipe?

" Do these silencers reduce the fans performace at all like a carbon filter does?? u know slow it doon or whaveter .
Flat-eric

no mate, all a silencer is , is a perforated tube with wadding packed around it then encased inside another tube,
no flow restrictions , just a whisper from were once there was a roar:wow:
if u have a 4" or 5" fan why not make ur own silencer,
pretty easy, i made one for my veg room fan,

1. get a piece of ridgid duct or pipe the diameter of ur fan (the longer the pipe the quieter it will be, but take into account any space restrictions u have) my silencer was a piece of 4" plastic sewer pipe about 8" long.
2. mark out a 10cm grid all around ur pipe and drill out the inter sections with a 6mm drill (approx 300 + holes, plastic pipe is easier drilled than metal duct)
taking care to leave 20mm on each edge of the pipe to allow connection of duct and fan.
3. for my wadding i used sponge from a furniture restorer, but any heavy sponge or foam will do as long as its hollowand dense (this allows sound waves made by the fan to revurabrate through the holes were it is absorbed by the dense material.
4. wrap ur sponge around the predrilled pipe and the afix it using heavy duty duck tape (very speedy after drilling all those holes), the more wraps around the sponge the better, and thats it 1 homemade silencer "

Been doing bit of homework and I think I'm going to make my own silencer. Anyone got any advise on what Is the best set up to keep it as quiet as possible?

Carbon Filter------->RVK---------->Ducting(2m/3m)-------->Silencer or

Carbon Filter------->RVK---------->Silencer--------->Ducting

thanks

I found that using rigid plastic ducting, rather than the "slinky" ally type cut the noise down considerably.