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Hi ,
I am planing on building a cabinet up in my attic. There is a 3 inch PVC vent stack up there that goes right up to the roof. My plan was to "T" into that and blow my exhaust out.
What do you guys think. What about when it rains? where does the rain water go?
Thanks any input.
That is an air vent for a bathroom I'm guessing. Try a "Y" with the out pointing up and you will not need to worry about water or anything getting into the line you are installing.
thanks,
Yea, up in my attic there is a large 3 inch pvc pipe that goes up out the roof, its the vent stack for the sewer/plumbing in the house?
there are several smaller pvc pipes that join into it. I am assuming that I can join into that and vent right up to the roof away from any neighbors?
I will be blowing air out it so would I get bad shit smell backup ?
You can tap into any of those pipes.
Each pipe is generally contstructed with a "P TRAP" below the toilets. This "P TRAP" fills with water and the water acts as a barrier to smell.
This is why whenever you smell sewer in a hotel or house, it is from a shower vent or sink vent that has not been used in a while and the "P TRAP" has dried up, thus allowing sewer gas to fill the area.
The only thing you want to make sure of....is the fan is indeed blowing air UP.......not down.
Ideally, buy the same dimeter pipe in the "Y FORMATION."
Cut out the proper height of existing pipe and, like Zandor sad, insert Y FORMATION UPSIDE DOWN, so the air is blow UP the piping.
Make sure it is the proper vent pipe you cut into. Some bathroom fans will exhaust into those as well, and if it is indeed a bathroom exhuast fan pipe, you will want to run that fan full time, otherwise the smell COULD backfire into a bathroom, especially when the outside air is hotter than the exhaust air.
But, most home builders these days build the bathroom fans so they just blow into the attic.
Hi Hard On,
Thanks for that info. The pvc where I want to tap into is horizontal, when it goes verticle its too out of the way, so I should be able to do what you are saying with a Y connector just position it so the flow is toward the exit , right?
Here is a picture of what I am thinking, should it work?
Rain shouldnt be a problem, because its going up?
Thanks, let me know what you all think. I am going to start the project this weekend.
Yes your diagram is perfect.
Couple of things...
Make sure your exhaust fan has a very high static pressure level. An inline fan wont cut it! It needs to be hgih static pressue.
Also, make damn sure thats a vent pipe and not something the builders ran electrical conduit thru.
Water isnt an issue as most of those pipes are capped at the top. If not, if you have a strong fan, air out will cause the rain drops to bounce off the top of the opening.
Your fan MUST be strong enuff to push thru all this pipe....either a vortex or squirrel fan would work best.
"you will want to run that fan full time, otherwise the smell COULD backfire into a bathroom"
that's bad hhehehehe
good point, thanks again, this is a step learning curve. I was going to use some computer fans, but now I understand why they would NOT do the job.
So I plan to build a cabinet aprox 31x24x31.
Which one of these or could you recomend one. Here is one on ebay for $10
http://cgi.ebay.com/120-VAC-SQUIRREL...QQcmdZViewItem
its 1.4 amps at 115 volts, thats over 150 watts? dont know about the cfm, actually that whole thing is confusing.
But this one is really nice $54
http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting
thanks again
this is too cool
My friend, those are total peeces of shit. :D
I QUOTE:
"This fan moves up to 100 Cubic Feet of air in less than two minutes."
I TRANSLATE:
"This fan is a peece of shit."
LOL...
sorry bro but you are in need of a high static pressure fan...
That means the more resistance, or distance the air must travel, the fan maintains the same RPM's.
I am afraid if you really want to do the job, you will need some more serious fan power.
Here is the one I bought when I got tires of fucking around with shitty rat assed fans for extraction....
http://discounthydro.com/ventilation.asp#vortex
Not cheap.
If you scroll down you will see the in line duct fans....
It all depends on how far you need to push the air. If you have a short length, maybe two inlines will work. But buy them at the Home Depot, they are 10.00 cheaper.
Or email me and i will see you my inlines i dont use.. $10.00 each.
I have 4 6" inlines and one 8" inline.
NO taxes, winning buyer pays shipping & handling.
Insurance is extra.
No sales tax.
All sales final.
All items warrantied 30 days.
Not responsible for fires or other calamities or acts of GOD.
Please read fine print for further details.
Each unit comes with a Genuine HARD ON Certificate of Authenticity :)
Hard On,
Dude , you are killing me!!
LOL. Hey, I just want to get something going and learn, then go back and upgrade. I really need to get the vent problem resolved not only for the plants but for my own paranoia. I cant finish my cabinet design till I know how big the fan is, by the way those blowers look pretty big for my 31 x 31 x 24 box ? but I guess I will need it to push the air all that way out the tube. What about noise do you know how quite that
Dayton 265 CFM Ventilation Fan/Blower is ? aprox.
I'm sorry are you talking 31 feet or 31 inches?
It is big...the fan rather....
I use my fan OUTSIDE the grow area and suck the air out as opposed to pushing the air out. It wont fir in my 31 X 18 (inches) box.
You could easily suck out the air in your box and blow it into the exhaust as you planned. Both intake and outtake are equipped for hoses or tubes. Just place the fan between the two and viola !
If this is in the attic, you;ll never hear it unless you're in the attic. Amazinngly quiet yet efficient. No more noise than most indoor fan, in fact probably less...
Place exhaust port on your growbox.....attach say a 4" diameter dryer vent to it and run it to the sucking side of the fan.....on the other side or the exhaust port of the fan, run another flex hose to your pipe Y connection.
Just hang the fan from the ceiling or let it sit on the rafters or gables.
WOrks great and dont build a grow room without it. Not only does it remove heat, provide strong flow of incoming air and will blow the smell out :)
Shit i just realized you asked about the Dayton fan...
THat squirrel cage fan will need to be IN THE GROW BOX to work. I dont know the dimenisons either but their shit is BIG.
There appears to be no air intake port for running hose to it. So, it would need to be placed in the grow chamber itself.
Trust on this. you wont have to "UPGRADE" later. This will satisfy your fan requirements whether you have a closet or a whole room.
Why buy twice?
thanks dude, I am going to go over to grainger today, thats my supply store, nearby.
I dont know if they have that model, but i will go for the 265 cfm range, I now understand about static pressure tool., The dayton one you refered me too, has a nice round output, which would be nice, Grainger.com shows several but I didnt see that one, and the ones they have , have square outputs, I will go there today maybe and see, its only 30 mins, I know I am being compulsive, and I should just order it online, probably be here in a few days, but I need it for dimensions and design .
Since I want to start building this weekend.
By the way, the cabinet dimensions were in inches
Thanks
The grainger I have near me is only wholesale. Oh well, I just went ahead and ordered the 265 Dayton fan that Hardon sent me. Ordered it from
discountHydro, really nice. Anybody know of a hydrogrow store in Atlanta?
Got my 150 HPS from Lowes.
Thanks HO !!
I am getting to work on project greentooth!!
computer guy.
Did you read this?Quote:
Originally Posted by qy8lfyer
"Shit i just realized you asked about the Dayton fan...
THat squirrel cage fan will need to be IN THE GROW BOX to work. I dont know the dimenisons either but their shit is BIG.
There appears to be no air intake port for running hose to it. So, it would need to be placed in the grow chamber itself. "
Just wanted make sure....you understood this fan needs to be INSIDE the box!
Yes, I do. My design is based on this oneQuote:
Originally Posted by HARDDON
http://www.overgrow.com/article/10/2
What do you think about it? I also just bought a 150 watt security light
I am going to mount the balast in the small compartment in the uper left.
Let me know what you think