SnapsProvolone
Well-Known Member
The filter cfm is a max rating. I say oversize the fan then slow it but be sure to use a speed controller that is sine wave. Crappy oned make fan motor groan. Variac is best as it changes wave amplitude.
help finding quiet extraction??
- Thread starter Hmmf
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Aeroknow
Well-Known Member
Excellent place for exhaust. Do you have a good sized gap under the door to the room this tent is in. Cause if you do, that can be where your intake could get its supply from.
Or crack the window?
I really don't have an answer about the fan size to slow down.
Yea get biggest baddest 6 inch fan you can buy. AND GET a good speed controller as stated before and carbon filter to match cfm rating of fan it never hurts to pull air at slower speeds thru filter. And then check your noises before purchasing anything else like silencers etc. Chimney is a great exhaust place. You need to be able to get fresh air into room. If your sucking in your house air your home ac will work harder as your sucking the air out the house your best bet would be pull fresh air from a window or attic(hotter air unfortunately).. if this route is used it would be best to install some type of air filter to keep bugs and random shit from getting to your grow area
No gap under the door, but could crack the window depending on how quiet a set up I can sort out. Any suggestions for decent fans that are already relatively quiet?
Any suggestions for a badman 6"?? I've been looking at those acoustic box fans as a decent starting point, but I've not been able to speak to anyone that has actually used one (fan is suspended by elastic already inside the acoustically lined box) the idea sounds spot on with what people have been telling me however be good to speak to someone with one! And at about £150 if it doesn't work very well, wouldn't be a happy lad haha
Brokeoldbloke
Active Member
I have a S&P TD-MIXVENT on a veg tent which is pretty quite running on high (2-speed) compared to the Can maxFan running on low (3 speed) in the flower room. S&P also makes a silent model that someone mentioned earlier. I sure its been mentioned but insulated ducting will also help.
skunkd0c
Well-Known Member
silenced acoustic ducting or non flexible ducting, do not use "turbo" inline fans or any fan rated over 30db if you want it to be very quiet
put the fan in a box, even a cardboard box will work well, fill the box with sound absorbent material rockwool works
8 inch are possibly the best for movement to noise ratio while still being practical
the bigger fans will have a lower RPM and make a deeper noise that is overall quieter
peace
put the fan in a box, even a cardboard box will work well, fill the box with sound absorbent material rockwool works
8 inch are possibly the best for movement to noise ratio while still being practical
the bigger fans will have a lower RPM and make a deeper noise that is overall quieter
peace
Is it quiet enough to comfortably sleep in the same room as? What else have you got for extraction? Silencer or anything? Nice one for the suggestions man
Maybe I've just had too many reefa's and I'm paranoid, but is that not a fire hazard? Or would it be sweet?
Aeroknow
Well-Known Member
This has been argued many times over the years. I like to err on the side of caution, and use a cfm fan close to cfm rating of filter.
And about where to pull air from, pulling from outside is usually going to be the best bet, assuming the outside air is not to cold or hot. Using some sort of temp controller works great to dial in the temps if outside air is used when its freezing. Not so good when its hotter than snot outside. Sometimes pulling from a "buffer zone" like your house, is good when too hot or cold outside.
Aeroknow
Well-Known Member
To the OP. You should hook it up as discussed before. If its to noisey go from there. You can wrap the fan in insulation, and foil tape the shit outta it. If the noise is coming through the door, which would probably be the case, you can hang a piece of carpet behind door.
Good thing your not attempting this before we had inline fans lol. The noisiest inline fan is 10 times quieter than the quietest squirrel cage fan of old.
Good thing your not attempting this before we had inline fans lol. The noisiest inline fan is 10 times quieter than the quietest squirrel cage fan of old.
Well the more contact an odor has with a piece of carbon the better scrubbing it is. It also depends on filter. The old phat carbon filters had 2 different ratings. 1 for continous scrubbing in a room is 700 cfm but if your exhausting with that filter they only want like 500 cfm so for better air odor control. So theres alot of variables. I would also agree get a 8 inch fan with 1 reducer that way you can get a 700-800 cfm fan turn down to half way run 400 cfm and yiur be whisper quiet with out a bunch of additional expenses everyone has there own opinions but I telling ya the cheapest route for good air movement and all the above I liked my maxx fan it was quiet may be quieter ones out yjid is my experience
I can get the same fan I mentioned above but the 8" for £136, moves 730m3/hr at 38 decibels with the probe to control heat and the built in speed control to slow it down, saves me buying the speed controller and that seperatley. Would you say sounds an okay setup to run?
Brokeoldbloke
Active Member
I don't sleep in the same room but if you can sleep with a normal floor fan running in the room. You should be comfortable with the S&P running. I use a 6" mounted to a board siting on top of the tent and a Can brand 9600 filter without the flange in the tent. No silencer or insulated ducting. I think there is more noise coming from the air flow in the ducting than is coming from the fan itself. Works well for my veg tent but it's nowhere near the CFM levels you're talking about in the posts above.
skunkd0c
Well-Known Member
No it will be fine your question is a wise one though, its something i considered better to be safe than sorry
if your fan were to malfunction fire is very unlikely there is no heat build up inside the box
if your fan is low quality with some inbuilt speed controller that has some circuitry where heat could build up, then i would add a small grill section to allow some air to escape this is how the metal boxed fans are designed, they have a few slits to let some air out
if you were to put a TV inside a box , yes that would be dangerous
TV's are full of components that when overloaded can actually burst into flames
a fan does not have this problem it is just an electric motor , also these fans are industrial equipment they are designed to last
they can run for years constantly without failure
rockwool is used for many things different grades/densities n treatments etc, one of its uses is
a fire retardant or fire barrier along with sound insulator heat insulator and of course hydroponics
http://www.rockwool.co.uk/products/u/2011.product/9842/building-insulation/fire-barrier-systems-
you can buy nice boxed fans, for £200 the metal ones are not so good they still sound quite loud
the wooden boxed fans are sound insulated like the metal ones but cope better
peace
bass1014
Well-Known Member
i built a box around my turbo fan,insulated it and hung it from the rafters with bungee cords and a ratchet strap (way to many bungee's to hold a 45lb box with a fan and duct lol) it makes a big difference in sound ALSO another tip is I use the neoprene pucks to mount anything on a hard surface to control noise.. there cheap and durable ..DIY TIP FROM HELL
skunkd0c
Well-Known Member
sounds good m8,
i decided not to hang mine, i found to my surprise that bubble-wrap the larger kind works very well to absorb all vibrations
i can sit my 250 watt fan on 3 inch thickness of bubble wrap and it removes all vibrations lol
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