Question about ventilation

[outsidethebox]

Hi ladies and gentlemen. This will be my first post and my question is regarding ventilation in my mother room. This is the second time I will have the room up and this time I have lined the walls in mylar and sealed the room. The room is 6x6x6. I am running a 600w MH. This time around I will venting the exhaust from the room to my attic where last time the room was pretty much open and I had too much smell for my circumstances from 6 mothers so that is why I have sealed the room. I was given a 6" inline duct fan and have set it up to pull air from the cieling of the room. There is a 4" inlet in the bottom corner of the room that will be where fresh air enters from the rest of the basement into the room.

My questions are as follows. Is the 6" inline fan enough to ventilate the room properly, and how should I time the fan?

Any help will be much appreciated.

 

[dbkick]

Fans come rated in cfm(cubic feet per minute), you'll need to calculate how big your area is and how many times per minute you'll need to refresh the air in the room. about the smell. Probably since your room is sealed you'll wanna run a exhaust when the light is on. In reality you should get a centrifugal fan and a carbon scrubber . Theres so many variables I don't think anyone will be able to give you the answer to your question without more details.

 

[Smot360]

Throw up some pics and describe the system.......(you don't want to take more air out of the room than you are putting in....if anything you would want to promote positive pressure with a larger intake) remember fresh air has about 400 ppm's of co2 so if you are taking too much air out and not replacing the air adequately your ppm's will drop and that's a no no! lol

 

[outsidethebox]

Fans come rated in cfm(cubic feet per minute), you'll need to calculate how big your area is and how many times per minute you'll need to refresh the air in the room. about the smell. Probably since your room is sealed you'll wanna run a exhaust when the light is on. In reality you should get a centrifugal fan and a carbon scrubber . Theres so many variables I don't think anyone will be able to give you the answer to your question without more details.

The fan is rated for 250cfm. The room is approx 216 cubic feet. Money is tight at the moment so a larger fan really isnt in the budget. If this fan will work I would really like to use it. I was considering trying to build a scrubber.

 

[outsidethebox]

Throw up some pics and describe the system.......(you don't want to take more air out of the room than you are putting in....if anything you would want to promote positive pressure with a larger intake) remember fresh air has about 400 ppm's of co2 so if you are taking too much air out and not replacing the air adequately your ppm's will drop and that's a no no! lol

I will get some pics asap. Do you think I should enlarge the intake?

 

[FootClan]

Hi ladies and gentlemen. This will be my first post and my question is regarding ventilation in my mother room. This is the second time I will have the room up and this time I have lined the walls in mylar and sealed the room. The room is 6x6x6. I am running a 600w MH. This time around I will venting the exhaust from the room to my attic where last time the room was pretty much open and I had too much smell for my circumstances from 6 mothers so that is why I have sealed the room. I was given a 6" inline duct fan and have set it up to pull air from the cieling of the room. There is a 4" inlet in the bottom corner of the room that will be where fresh air enters from the rest of the basement into the room.

My questions are as follows. Is the 6" inline fan enough to ventilate the room properly, and how should I time the fan?



Any help will be much appreciated.

I prefer to have negative pressure not postive.......If you want to contain your smell you will need negative pressure atleast when the scrubber fan comes on.......... I guess if your in a sealed grow you dont need negative pressure but if thats the case you will need CO2

 

[outsidethebox]

I prefer to have negative pressure not postive.......If you want to contain your smell you will need negative pressure atleast when the scrubber fan comes on.......... I guess if your in a sealed grow you dont need negative pressure but if thats the case you will need CO2

Fortunately CO2 is something that I do have easy access to. How hard/costly is it to have a CO2 generator in a room of my size?

 

[dbkick]

The fan is rated for 250cfm. The room is approx 216 cubic feet. Money is tight at the moment so a larger fan really isnt in the budget. If this fan will work I would really like to use it. I was considering trying to build a scrubber.

building a scrubber is ALMOST not feasible depending on what things you have access too, I work in a heat and air sheetmetal shop and material cost was zero. the thing is activated charcoal cost 4 US dollars a pound and although you MAY be able to get by with one that contains 8 pounds or so, maybe even as low as 5 pounds of charcoal the disadvantage is the less charcoal it contains the quicker it will need replaced. My original one took 15 pounds of charcoal to fill. worked well but I had high humidity(this cuts life of charcoal ) and it didn't seem to last long, one grow actually. So I'm in the process of building a smaller one , 8 pounds of charcoal . But until you have the means to do it and do it right maybe the odor won't be bad, good luck and happy growing.

 

[FootClan]

Fortunately CO2 is something that I do have easy access to. How hard/costly is it to have a CO2 generator in a room of my size?

not sure never had one......Im going to go the compressed tank route for my Co2

 

[FootClan]

building a scrubber is ALMOST not feasible depending on what things you have access too, I work in a heat and air sheetmetal shop and material cost was zero. the thing is activated charcoal cost 4 US dollars a pound and although you MAY be able to get by with one that contains 8 pounds or so, maybe even as low as 5 pounds of charcoal the disadvantage is the less charcoal it contains the quicker it will need replaced. My original one took 15 pounds of charcoal to fill. worked well but I had high humidity(this cuts life of charcoal ) and it didn't seem to last long, one grow actually. So I'm in the process of building a smaller one , 8 pounds of charcoal . But until you have the means to do it and do it right maybe the odor won't be bad, good luck and happy growing.

Ya making one seems like a big hassle and then it goes bad.....i buy a new filter every two cycles......

 

[dbkick]

not sure never had one......Im going to go the compressed tank route for my Co2

This isn't cheap but def pays for itself, the problem is having a truly sealed room . I run co2 and my room is actually only half assed sealed, I'm sure I waste some co2 but do benefit beside the fact. Op says money is tight and I can def relate to that right about now so even the cost of refilling co2 may be a problem. I have a small room and a controller I have to dial in and guess(soon to have ppm controller) and a tank that costs from 10-13 dollars to refill lasts me almost 2 weeks.

 

[FootClan]

This isn't cheap but def pays for itself, the problem is having a truly sealed room . I run co2 and my room is actually only half assed sealed, I'm sure I waste some co2 but do benefit beside the fact. Op says money is tight and I can def relate to that right about now so even the cost of refilling co2 may be a problem. I have a small room and a controller I have to dial in and guess(soon to have ppm controller) and a tank that costs from 10-13 dollars to refill lasts me almost 2 weeks.

Ya where i live its 25 bucks to refill 20lb tank......

 

[outsidethebox]

So should my fan be running only when the light is on or should it be going on and off all the time?

 

[dbkick]

Throw up some pics and describe the system.......(you don't want to take more air out of the room than you are putting in....if anything you would want to promote positive pressure with a larger intake) remember fresh air has about 400 ppm's of co2 so if you are taking too much air out and not replacing the air adequately your ppm's will drop and that's a no no! lol

This guy has the right idea, you'll get much more help with photos. Dunno what he's saying about the co2, outdoor air contains like 300 ppm co2, indoor air is much higher in co2.