inline carbon filter for 4" duct?

[fatcat666]

is there anything out there i can put into a 4" exhaust duct from my dual hose a/c to kill smells? dual hose a/c is not supposed to create negative pressure and leak odor but i can see the poly on the wall start to pull in when the a/c's exhaust fan kicks on so i assume its pulling air out. i heard there were pucks or something that you can stick right in the duct to help alleviate smells... would ozone work in this?


im thinking of putting a dryer sheet in the exhaust duct as well as over the intake on the a/c where i believe its sucking some room air in and out. as well ive got a 675cfm fan on a carbon scrubber doing the room already and i'm getting a couple vaporteks to put in and around the grow so hopefully the little bit of air that the a/c exhausts out when the fan kicks on is not going to be too big a deal

 

[fatcat666]

i found this by vaportek:

its 3" in diameter so i was thinking i could just plop it in the exhaust hose and be done with it

hopefully it works

 

[Jnugg]

Does it have to be an inline?

 

[fatcat666]

unfortunately, cant have anything on the end of the duct, cause it would hang out the window. im going to put one of those Vaportek simple clip system disks in the exhaust duct itself, and then i will find one of those HVAC carbon filters to put over the intake on the backside of the A/C which is drawing in the air thats mixing with the exhaust.

 

[fatcat666]

can anyone tell me how they think this would work?

 

[CANNACO-OP]

anyone ever try carbon fish filters? they are like about an inch or so thick, black, like a filter on a furnace also, but carbon, passes air thru easy..

 

[420blunts]

build a wooden box, place can filter inside, cut 4" or 6" or 8" (depending on fan size) hole on top section of box for fan & exhaust duct, cut 4" hole on side of box for ac exhaust. place exhaust duct from fan where ever your exhaust location is. make sure you seal up the box really good. you don't want exhausted ac air in your room. now you have your ac exhausted with no smell. hope this helps. peace



420 EVERYDAY !!!

 

[JackTheGrower]

The guys use granular carbon I use 4mm activated carbon..

I trust it mostly.. Can't say it's perfect all the time but 99.9% I can't smell anything.

It's that last 0.01 paranoid percent that gets us all.. LOL Just kidding..

How come folks don't sell inline filters? No one has built one either ?

Scratches head.. What will I use LOL!

 

[Jnugg]

I'd build a pro carbon scrubber and place it in my grow before the exhuast fan,but not hooked up to the intake!

there are Four ways

1: outside air > passive intakes > grow room > carbon filter > exhuast fan > outside air

2: outside air > passive intakes > grow room > exhuast fan > carbon filter (otside of grow room).

3: outside air > passive intakes > growroom > carbon filter > a/c light(s) > exhuast fan > outside air

4: outside air > passive intakes > growroom > a/c light(s) > exhuast fan > carbon filter outside of grow

#2 is out of the question,and so is #4 so I would go with #1 or #3.

 

[fatcat666]

hey all, would this work? this is 420blunts idea (thanks!!) but without an active exhaust out of the box, just a passive.

please pay close attention to the passive exhaust out of the box. i was going to put a fan in the exhaust out of the box, but since the a/c exhaust fan runs only intermittently, having an exhaust fan from the box running 24/7, pulling on it and forcing it probably wouldn't be good. i imagine that with just a passive vent out of the box, the hot air would exhaust just fine, because if the container housing the can filter is absolutely air-tight, the hot air obviously has to go somewhere. i realize that when the a/c exhaust turns off that the box itself will continue to hold unexhausted hot air inside of it, and it would probably add a bit of heat to the room by its very nature but i planned to insulate it to minimize it. you could probably wire something up to make an a/c box exhaust fan run only when the actual a/c exhaust fan runs, but it would take alot of money and time i bet.

also, i realize canfilters are meant to be pulled through rather than pushed, but they work just fine being pushed through although they have a shorter lifespan that way. doesn't matter to me as long as it does the job.

imagine how much easier this would be if someone manufactured a good inline carbon filter.


its really late at night and im drinking lots of energy drinks and watching soft core martial arts action porno while trying to finish my room

god help me

 

[hoosierdaddy]

I bet you could look at the internals of the AC unit and figure out how to isolate the intake/exhaust air from the cool air. There is a leak in your system. The air that is causing the poly to suck in is being pulled from somewhere, and most likely the bulkhead that seperates the cool air from your coil cooling air has an opening of some sort. See if you can get that sealed and caulked and there should be no more problem. If it still sucks in the poly after that, then the intake and or exhaust duct is leaking.
The room should never even know your hot exhaust is running, and if it does, there is a leak somewhere.

 

[fatcat666]

I bet you could look at the internals of the AC unit and figure out how to isolate the intake/exhaust air from the cool air. There is a leak in your system. The air that is causing the poly to suck in is being pulled from somewhere, and most likely the bulkhead that seperates the cool air from your coil cooling air has an opening of some sort. See if you can get that sealed and caulked and there should be no more problem. If it still sucks in the poly after that, then the intake and or exhaust duct is leaking.
The room should never even know your hot exhaust is running, and if it does, there is a leak somewhere.

ok i will try that. i just realized that with it venting out room air, its actually probably cooling a bit better than if it was absolutely sealed. but then again, if i can get it totally sealed i can put co2 in, which i initially planned to do before i found out that the designers at Danby are asshats.

 

[fatcat666]

ok, i just opened the POS up and it looks like all that is used to "seal" the top A/C portion from the bottom intake and exhaust portion is some cheap foam that is supposed to be sandwiched between the horizontal plastic ledge (separating the upper A/C portion from the bottom intake and exhaust portion) and the actual units exterior plastic cover. If they had used metal parts and some sort of clamping system or a good pressfit, it would be totally sealed. but in this day and age we are more focused on mass production and disposable goods than quality that lasts a long time.

I was just going to spray some "Great Stuff" foam in there to give it a nice tight seal but then i realized its flammable. have to find something that is not!!! hopefully this fixes it. i imagine if i succeed in sealing off the upper portion from the lower intake/exhaust portion that i will somehow decrease the effectiveness of the a/c a bit. i don't mind that if it means keeping the smell in.


im so tired so i might be rambling

 

[hoosierdaddy]

I am just about certain that sealing that off will INCREASE the effectiveness of the unit.
There is absolutely no reason the exhaust air should mingle with the cold air, and if it does it just makes it harder to keep cold.

That spray foam comes in various grades...the lesser expanding ones are the ones to use.
They are only volatile before they are cured, after they set they are no more flammable than the foam in the unit now.
Blue RTV silicone caulk is high temp and will do the job if you want a more proper sealant to use. Not sure how stuff will react with the styrofoam you described though.
You could always take that out and make a copy of it using another material.

 

[fatcat666]

i had a closer look and it seems that at the bottom of the unit there are gaping holes where the hot air exhaust fan on the unit can draw air in from the room!!!!

the goal is to isolate the bottom two chambers from the room entirely. Its going to be tough, based on how they put together the unit. there are holes everywhere, and many of them inaccessible. I hope that by sealing off the larger ones, that it takes care of most of the job.


basically, it looks like the attachment ideally. in reality the exhaust fan is sucking air from both the intake chamber and from the room itself, through holes in the unit drawing in room air.


im going to put it back together and smoke in the room and see where the smoke is sucked to

 

[ScrubNinja]

How come folks don't sell inline filters? No one has built one either ?

 

[LlamaSchool]

Have you seen this inline filter?

http://www.bghydro.com/BGH/itemdesc.asp?ic=AOCCF066IN&eq=&Tp=