Question on ventilation

NugHeuser

NugHeuser

Well-Known Member
The setup I have in mind is almost picture perfect, except for one thing, where I almost have to have my flower tent giving the circumtances and room to work with, would cause me to have to vent my exhaust roughly 15 feet across the room and cut a hole in the wall to exhaust air to a different area, the problem is I'm wondering if my 8" fan and filter would be adequate enough for my 8 x 4 tent to push air that far off and keep up with odor control, the more ducting you have, the less air flow you're getting. And I'm running on a "budget" of electricity, can't let the bill get to high because its a smaller house, so booster fans/bigger fans is a bit of a sore option, I'm already basically topped out on wattage for my comfort zone.

So my question is, if I vent the air simply outside of the tent, along with my 5x5 veg tent, are the draw backs really going to be that severe, will they even be noticeable?
I'm speaking from the stand point of CO2, they say exhaust air should be sent to another room or the plants could "scrub" the air of CO2, causing stunted growth and what not. This is roughly a 35x20 foot area(basement). Do you see half of a house(basement) really not being able to keep up with replenishing CO2 for the plants that breathe it?
I appreciate any feedback.
 
G

growingforfun

Well-Known Member
NugHeuser said:
The setup I have in mind is almost picture perfect, except for one thing, where I almost have to have my flower tent giving the circumtances and room to work with, would cause me to have to vent my exhaust roughly 15 feet across the room and cut a hole in the wall to exhaust air to a different area, the problem is I'm wondering if my 8" fan and filter would be adequate enough for my 8 x 4 tent to push air that far off and keep up with odor control, the more ducting you have, the less air flow you're getting. And I'm running on a "budget" of electricity, can't let the bill get to high because its a smaller house, so booster fans/bigger fans is a bit of a sore option, I'm already basically topped out on wattage for my comfort zone.

So my question is, if I vent the air simply outside of the tent, along with my 5x5 veg tent, are the draw backs really going to be that severe, will they even be noticeable?
I'm speaking from the stand point of CO2, they say exhaust air should be sent to another room or the plants could "scrub" the air of CO2, causing stunted growth and what not. This is roughly a 35x20 foot area(basement). Do you see half of a house(basement) really not being able to keep up with replenishing CO2 for the plants that breathe it?
I appreciate any feedback.
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Youll be fine so long as it doesnt get too hot. Co2 is a overstressed factor in my opinion. Its not like light, water, or rootspace.
 
NugHeuser

NugHeuser

Well-Known Member
growingforfun said:
Youll be fine so long as it doesnt get too hot. Co2 is a overstressed factor in my opinion. Its not like light, water, or rootspace.
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Planning on using 9 cobs and 2 315w cmh's in the 8x4, hopefully that keeps the heat down. Thats the only reason I decided to buy cobs, for summer growing. I do have one central a/c vent down there so that'll help.
 
G

growingforfun

Well-Known Member
NugHeuser said:
Planning on using 9 cobs and 2 315w cmh's in the 8x4, hopefully that keeps the heat down. Thats the only reason I decided to buy cobs, for summer growing. I do have one central a/c vent down there so that'll help.
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Well then you also have fresh co2... lol this isnt rocket. Dont take this wrong, you sound like this may be your first run. So if it is just take it easy an dont try too hard. Let em grow. Dont mess with them every dang day, they dont like it. Patience.
 
NugHeuser

NugHeuser

Well-Known Member
growingforfun said:
Well then you also have fresh co2... lol this isnt rocket. Dont take this wrong, you sound like this may be your first run. So if it is just take it easy an dont try too hard. Let em grow. Dont mess with them every dang day, they dont like it. Patience.
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No offense taken, but no it'll be my 3rd indoor. Have done a couple outdoor before all that. Actually I really can't believe I didn't think about the fresh co2 via a/c, it actually never even crossed my mind that I would have a/c down there until I mentioned it to you. It's a completely new setup and area from where it has been the past couple times, before I didn't have an a/c vent in the room, and I just decided on this plan within the past few days so I'm not seeing it picture perfect yet, it's all just coming together slowly but surely. I appreciate the input though, I figured it shouldn't make a shit bit of difference, just looking for some reassurance :smile:
 
Gquebed

Gquebed

Well-Known Member
You will have heat problems. Hot air circulating in and out of the tent just getting hotter. Get that hot air out of the room...

Never mind that without fresh co2 rich air coming in you will "starve" your plants of co2. They will develop brown spots. You will assume nute deficiency. You will come here looking for answers. People will talk about ph and flushing. And you will waste your time chasing your tail around in circles. Meanwhile your plants will keep dying slowly.

Ask me how i know.

Get that hot air out of your tent and out of the room that the tent is in. Trust me.
 
G

growingforfun

Well-Known Member
Ive grown a a 10x10 basement room with zero venting outof the room amd no ac vent, using a 1k hps been doing just fine.
I knew it wouldnt be long before someone said co2 starved, but ive litterally never seen evidence of this happening.

Heat and humidity may be a issue but bacements stay cool on average, and sp your left woth humidity to think about, a dehum would do it
 
OldMedUser

OldMedUser

Well-Known Member
growingforfun said:
Ive grown a a 10x10 basement room with zero venting outof the room amd no ac vent, using a 1k hps been doing just fine.
I knew it wouldnt be long before someone said co2 starved, but ive litterally never seen evidence of this happening.

Heat and humidity may be a issue but bacements stay cool on average, and sp your left woth humidity to think about, a dehum would do it
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In a hundred square foot room, unless right full of plants, you wouldn't get too low on CO2 but in a tent full of plants you sure will unless you have regular air exchanges.
 
G

growingforfun

Well-Known Member
OldMedUser said:
In a hundred square foot room, unless right full of plants, you wouldn't get too low on CO2 but in a tent full of plants you sure will unless you have regular air exchanges.
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Itals a 35x20 bacement with a couple small tents in the middle and a ducted fan pulling from the tents to the rooms so shpupd be plently of freash co2 in the wbole area, and when he opens the door to work, as he is breathing out fresh co2 etc. I think its ok but maybe he will have to cut that hole eventually as he goes on
 
NugHeuser

NugHeuser

Well-Known Member
OldMedUser said:
In a hundred square foot room, unless right full of plants, you wouldn't get too low on CO2 but in a tent full of plants you sure will unless you have regular air exchanges.
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An 8x4 tent and 5x5 that sits in roughly a 700 sq ft room, with the furnace/AC and the first register running off the unit blowing towards the tents. Does this change things? I plan on a 6" inline on the 5x5 and 8" inline in the 8x4, both exhausting air. Not trying to justify, just want to make sure I don't go further out of my way than I need to
 
NugHeuser

NugHeuser

Well-Known Member
Gquebed said:
You will have heat problems. Hot air circulating in and out of the tent just getting hotter. Get that hot air out of the room...

Never mind that without fresh co2 rich air coming in you will "starve" your plants of co2. They will develop brown spots. You will assume nute deficiency. You will come here looking for answers. People will talk about ph and flushing. And you will waste your time chasing your tail around in circles. Meanwhile your plants will keep dying slowly.

Ask me how i know.

Get that hot air out of your tent and out of the room that the tent is in. Trust me.
Click to expand...
Wouldn't my central a/c unit running on and off all day bring enough fresh co2 to the room? I appreciate your feedback.
 
Gquebed

Gquebed

Well-Known Member
NugHeuser said:
Wouldn't my central a/c unit running on and off all day bring enough fresh co2 to the room? I appreciate your feedback.
Click to expand...
You have central a/c?

I dont know... never had the pleasure...lol... of dialling in a grow room in a place with central a/c.
 
OldMedUser

OldMedUser

Well-Known Member
NugHeuser said:
Wouldn't my central a/c unit running on and off all day bring enough fresh co2 to the room? I appreciate your feedback.
Click to expand...
An A/C doesn't create CO2 but as long as it or the furnace are blowing fresh air into the room stale air is going out so the CO will be replenished by the fresh air. Atmospheric CO2 is 400ppm these days and that's plenty for normal growth.

I bought a CO2 controller last summer but haven't used it with a tank yet. It does have LEDs on to show the level and in the grow room it goes up to around 1250 if I'm in there working for a while. I made alcohol lamps to burn in the rooms and after 20 min the top light is blinking which indicates it's over 1600ppm. With the 1000W going the fan kicks in fairly often so the CO2 levels and my humidity take a big hit for a while so I'm starting to think about setting up a sealed room. Will need A/C or heat exchanger and a dehuey.

The main thing I like CO2 for is the stretch. They just explode with lots of CO2 and temps up to 90F. Finally get my RH up to 60% or so.

CO2Controller03.jpg

With just one wick burning it gets over 1500 in a half hour. Sits in a steel pail in the grow room.

AlcoholLamp4CO20x.jpg

And when the wicks are burned down it works well and doesn't use so much methyl hydrate.

:peace:
 
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