[Retardo Motabonne]

I had to move a room into a tent recently and am new to venting a small closed system. Currently I am running an 8" vortex from a large scrubber outside the tent. Forced clean air is forced through the hood and back out the tent. For the next two weeks I need the odor/humidity sewn up tight. I was considering using another 4" fan with a small filter inside the tent for active room exhaust and better filtration. Can I push through my large filter by flipping the inline fan? If so I could keep a hood duct open and pull room exhaust out It's other end into the filter. It's always been set up to suck air through it and out the fan to duct. I'm wondering if there is a better way to filter this room with what I have right now. There is no room in the tent for it as the carbon filter is like 42" tall and 18-24" in diameter. I'm broke so I'd rather use what I have, but if I went with another fan and filter I can move it to another tent being set up after I make it through the next two weeks so more gear is still an option.

[Devilsharvest]

Correct me if im wrong, but you have the filter and extactoroutside yor tent? And your using a 2nd fan as the air in.

I keep maening to open a thread on the likes of these questions.

The exractor sucks air in through the filter, and spits out the other side of the extractor. Some people turn it around but that just isnt as good, allthough int heorie it should do the job. Its louder first of all, and your filters life will deminish.
I trie to visualise the flow of dirty , hot air as red and cool clean air as blue. So if Im right your tent is "bulging" with "purple" air and than being sucked into a room by the filter and than out of that room. But the room the filter is allso in a "blue" room. In other words your filter is working to keep its suroundings filtered not just the "red" tent. AAAAHHH Im gonna explain this stuff another time in the morning not now. Any way the solution is :
1: Turn off your air in ( there could be to much air for extractor) or
2: Hang your filter in the tent and as I recomend or
3: Build a wall so that the filter has less room to filter

the problem most likely is that your filter has to much other air to clean rather than the specific air you want it to clean. So be more specific make the space smaller and air tight with caulk and building foam, innertubes on door edges. Good luck

[Retardo Motabonne]

Thanks for the response DH. Yup, filter/extractor is outside of tent, ducted to reflector inside. duct goes through the light then ducted outside the tent. Only active air inside is a fan with tent open. As the enclosing room is only about 500ft3, a 100lb filter and 8" extractor fan has done very well. I don't have a stink but I can smell the humid air a bit. Noone else has smelt anything here. If the popo comes to the dodo I wan't no trace of scent. I need better for a couple weeks as the popo is in the hood, I know for fact, they are here but they are working nearby on a certain residence and the street crimes that are occuring from it. I know between now and the end of the month its going to be red hot here. I need clean room quality air while the shit hits the fan. Just want clean air, other precautions are being taken so no need for code red type post like "cut and run dude" or "clean out now" . All other ideas for help protecting the fort are welcome and needed. Do you think a little 4" 15lb. filter like the can 2600 or those new hepa filters that screw on an extractor hung in the tent and pushed out will cover all bases or should I put a filter on the main floor temporarily? Thanks again DH.

[Devilsharvest]

No worries.
So if I understand correctly the 2nd fan in the tent in not an enclosed extacter but a so called table fan or the likes of that. Ussually humidity appears when the temp. in the room is warmer than outside temp. The solution is to bring in more fresh air. Put another extractor in there just blowing fresh cool air in there, and the moldy wet sock smell should go. You could even make duct pipes out of cardboard and ducttape (good ole' ducttape) and mount them on both sides of a tablefan. one side in the tent the other from another room. I like to build walls in front of windows. Window on a crack\ cat flap in door, extractor sucking air out and into grow opp. In the summer u can put an aircondtioner behind the wall and in the winter a heater.
I wrote a blurb in "grow room desighn and set up" for someone in the thread "costum closet question" u might get some usefull info out of that aswell. Good luck! let me know if it works im curiuss myself now.

[doubleds]

First things first, i have never met a carbon filter that eliminates 100% of odour. They all claim to but don't. Alot of people seem to suck through a filter and blow directly outside, this to me is a very bad idea if smell, any smell is a concern to you. Sucking through a can filter to exhaust is at best 70% effective if your grow room is under 50% humidity, well below that if the humidity is higher. A can used as a scrubber (no exhaust) just constantly scrubbing the air inside your growroom is a must have if you exhaust air from your room.

A can 50 scrubbing and a can 50 exhausting will raise you up to 90 % (can 50 for clostets to 1m grow tents)

here's a pick of the ones i use, can 150's, i use 4 double scrubbing. A 12 inch vortex sits on top of the can 150 sucking air through then flows through 12 inch ducting to another can 150 that the air blows through. the only time i smell anything is about 8 weeks in flower.

[Kuntjoose]

retardo can u put up a pic of ur ducting and filter system it will make sthis much more easy to work out here is a pic of mine i pull air thru the filter and then push it thru my hood to cool the bulb and then it goes out the top of my closet. i no its no the most effective way to do it but it works quite well i gets no smell and these guys get pretty skunky

[Devilsharvest]

Originally Posted by doubleds

First things first, i have never met a carbon filter that eliminates 100% of odour. They all claim to but don't. Alot of people seem to suck through a filter and blow directly outside, this to me is a very bad idea if smell, any smell is a concern to you. Sucking through a can filter to exhaust is at best 70% effective if your grow room is under 50% humidity, well below that if the humidity is higher. A can used as a scrubber (no exhaust) just constantly scrubbing the air inside your growroom is a must have if you exhaust air from your room.

A can 50 scrubbing and a can 50 exhausting will raise you up to 90 % (can 50 for clostets to 1m grow tents)

here's a pick of the ones i use, can 150's, i use 4 double scrubbing. A 12 inch vortex sits on top of the can 150 sucking air through then flows through 12 inch ducting to another can 150 that the air blows through. the only time i smell anything is about 8 weeks in flower.

Hmm, I never have any smell come out of the exhaust. I have my filter connected to the extractor and then out to a separate room (usually the kitchen) with a window/catfap open in that room. Once a year i replace them, the last few weeks of that year you now its time to change the filter. I use the same size filter in the pic for 6-8 600's, and never have any smell isues. Offcourse I caulk evry crack in the woodwork and make the doors as airtight as possble. and this in my opinion is more important than the size filter and extractor. If the room is as airtight as can be, the overcapacitie of the extractor will suck through the inperfections making all the air go through the filter of the room. By blowing in in fresh temperatured controlled air with a 2nd extractor that is of a smaller capacity its no problem to keep the room under 50% humidity. Once again I never have smell isuies.

[jhood]

::thats the biggest filter iv ever seen in my life i could get in dat. And ur light set up is fat .
jhood

[doubleds]

Hi Devilharvest, man you must not be growing strains that hum brother, I have a sour diesel cutting you can have and i guarantee you'll be sprinting for the hydro store for more filters at week 4 lol. My og g13 you dont need a filter period but my williams wonder, chemo, diesels and such you better have big ones !!

[hazyfontazy]

Originally Posted by doubleds

Hi Devilharvest, man you must not be growing strains that hum brother, I have a sour diesel cutting you can have and i guarantee you'll be sprinting for the hydro store for more filters at week 4 lol. My og g13 you dont need a filter period but my williams wonder, chemo, diesels and such you better have big ones !!

an get ozone on top opf that just to be sure ,,