Need help with humidity/heat

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robertoj86

robertoj86

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New indoor grower, living in Missouri (cold winters) I’m growing in a spare bedroom with 5x5x7 tent. Using a growers choice roi 720 for light growing in amended soil 4 plants in 1 gal buckets that I got as clones. Using an ac infinity t6 inline exhaust fan venting to a carbon filter that is sitting on the ground next to my tent. Had planned for the filter to hang inside the tent but with this light strength I need all the headspace I can get. Purchased extenders for the tent but don’t have enough height oh my bedroom ceiling. I have a humidifier inside of the grow tent. My issues are that while the light is running I have to intake cool air from outside of the house through the window just to get the temps down to 75-76 degrees. It’s usually below 40F outside so while the lights are off my tent will become too cold. I would turn the exhaust fan off during the dark time but if I do they my humidity will jump up over 60% maybe even 70%. I’m passively in taking from the window with a 6 inch tube just drawing in air from my exhaust fan that is feeding the carbon filter next to the tent. Do I need another fan or do I need to see my exhaust up differently? I’m about 1 week into veg with these clones.
Thank you to anyone that can help
 
AKgrow

AKgrow

247
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Feeding the filter? Next to the tent? The filter should be in the tent on the exhaust fan which should be exhausting the heat out of the tent, possibly out the window. My first grow was in a 4x4 and I had to exhaust out a window during the day and close the window at night. I was always having to mess with the intake flaps and fan set speed, window opening, light intensity, dehuey settings, bullshit in a tent just to keep the environment steady. Didn't like the tents.
 
Chem77

Chem77

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New indoor grower, living in Missouri (cold winters) I’m growing in a spare bedroom with 5x5x7 tent. Using a growers choice roi 720 for light growing in amended soil 4 plants in 1 gal buckets that I got as clones. Using an ac infinity t6 inline exhaust fan venting to a carbon filter that is sitting on the ground next to my tent. Had planned for the filter to hang inside the tent but with this light strength I need all the headspace I can get. Purchased extenders for the tent but don’t have enough height oh my bedroom ceiling. I have a humidifier inside of the grow tent. My issues are that while the light is running I have to intake cool air from outside of the house through the window just to get the temps down to 75-76 degrees. It’s usually below 40F outside so while the lights are off my tent will become too cold. I would turn the exhaust fan off during the dark time but if I do they my humidity will jump up over 60% maybe even 70%. I’m passively in taking from the window with a 6 inch tube just drawing in air from my exhaust fan that is feeding the carbon filter next to the tent. Do I need another fan or do I need to see my exhaust up differently? I’m about 1 week into veg with these clones.
Thank you to anyone that can help
With LED’s you can run 80 degrees or so. I keep my humidity 65 or less, and I keep my exhaust on 24/7.
 
MIGrampaUSA

MIGrampaUSA

2,087
263
New indoor grower, living in Missouri (cold winters) I’m growing in a spare bedroom with 5x5x7 tent. Using a growers choice roi 720 for light growing in amended soil 4 plants in 1 gal buckets that I got as clones. Using an ac infinity t6 inline exhaust fan venting to a carbon filter that is sitting on the ground next to my tent. Had planned for the filter to hang inside the tent but with this light strength I need all the headspace I can get. Purchased extenders for the tent but don’t have enough height oh my bedroom ceiling. I have a humidifier inside of the grow tent. My issues are that while the light is running I have to intake cool air from outside of the house through the window just to get the temps down to 75-76 degrees. It’s usually below 40F outside so while the lights are off my tent will become too cold. I would turn the exhaust fan off during the dark time but if I do they my humidity will jump up over 60% maybe even 70%. I’m passively in taking from the window with a 6 inch tube just drawing in air from my exhaust fan that is feeding the carbon filter next to the tent. Do I need another fan or do I need to see my exhaust up differently? I’m about 1 week into veg with these clones.
Thank you to anyone that can help
I run the same E720 in a 5 x 5 and I also have an 8" infinity series fan exhausting through the carbon filter which has been placed OUTSIDE of the tent. This is actually one of the setups shown in the directions I received with the unit. Yes, it will shorten the useful life of your carbon filter some ... but that carbon filter is a consumable anyway so it's not supposed to last forever. If you want to extend the life of your carbon filter, simply prefilter for debris at the exhaust inlet inside your tent. I exhaust directly into my basement mechanical room that also holds my tent, not to the outside of my house. Intake air is passive, and drawn in by the exhaust fan from that same room. No 2 houses are the same. Don't set things up a certain way because someone else says its the way it should be done. Instead, everything you do should be done with the idea of maintaining the environment inside the tent. Someone already suggested moving the dehumidifier outside of the tent. I would start there. It's contributing to your issues by being in the tent while also taking up valuable real estate.

Pictures of what your setup looks like would help a lot. If you can post some pictures, people here will help you get things sorted out.
 
MIGrampaUSA

MIGrampaUSA

2,087
263
Feeding the filter? Next to the tent? The filter should be in the tent on the exhaust fan which should be exhausting the heat out of the tent, possibly out the window. My first grow was in a 4x4 and I had to exhaust out a window during the day and close the window at night. I was always having to mess with the intake flaps and fan set speed, window opening, light intensity, dehuey settings, bullshit in a tent just to keep the environment steady. Didn't like the tents.
This is not exactly true.

It's completely acceptable to place the carbon filter outside of the tent. It's one of the suggested setups that came with my carbon filter system. It allows for vertical space which someone using a bar light fixture will certainly want. If you're concerned about "feeding" the filter, simply pre-filter your exhaust with some cheese cloth or similar material ... a furnace filter, etc.
 
lvstealth

lvstealth

Supporter
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You spent a pretty penny getting a cool light and now you are suffering for it.

To run that light at its intended use, you need a lot of things. CO2 for a start... But, we are here, so what to do now?

You do not mention a dehumidifier at all. That should have been the other thing you spend a dollar on! Drier air is easy to "condition". You try to make your wet air stay at some decent temps, but it WONT EVER.

Condition your air. Temp, humidity and circulation, then feed it to your tent. Exhaust any "used" air to the outdoors.

Get to a point where you can close that room off and it won't change temps.

You will either be opening, closing, turning on and off everything if you don't automate.

Get the inkbird stuff and hook dehuey and ac and heat to it. Or, and I MUCH prefer this, get smart stuff and control it auto or manual from your phone.

A smart plug is 6 bucks, some temp and rh meters at 10 bucks. Set it up with smartthings and that's done and dusted!

When you are out and something happens, fix it on the phone and go about your day.

But your biggest flaw here is no dehuey. You can't make this work without it.

The dehumidifier is the key. Dry air is EASY to condition and it lasts.
 
MIGrampaUSA

MIGrampaUSA

2,087
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You spent a pretty penny getting a cool light and now you are suffering for it.

To run that light at its intended use, you need a lot of things. CO2 for a start... But, we are here, so what to do now?

You do not mention a dehumidifier at all. That should have been the other thing you spend a dollar on! Drier air is easy to "condition". You try to make your wet air stay at some decent temps, but it WONT EVER.

Condition your air. Temp, humidity and circulation, then feed it to your tent. Exhaust any "used" air to the outdoors.

Get to a point where you can close that room off and it won't change temps.

You will either be opening, closing, turning on and off everything if you don't automate.

Get the inkbird stuff and hook dehuey and ac and heat to it. Or, and I MUCH prefer this, get smart stuff and control it auto or manual from your phone.

A smart plug is 6 bucks, some temp and rh meters at 10 bucks. Set it up with smartthings and that's done and dusted!

When you are out and something happens, fix it on the phone and go about your day.

But your biggest flaw here is no dehuey. You can't make this work without it.

The dehumidifier is the key. Dry air is EASY to condition and it lasts.

I run that same light in a 5 x 5. You don't need CO2.

You also do not automatically "need" to exhaust to the outside. What "needs" to be done is to figure out what works for your grow area. If I were to exhaust to the outside where I am at, I would be opening myself up to other issues. What works for me in my basement ... an already relatively stable environment ... is using the stability of that environment and NOT upsetting it by introducing things that don't need to be introduced. This idea that too many people have about air quality in the room suffering if you exhaust into the room or only use "intake" air from the outside is what frequently becomes the barrier to getting their environmental issues resolved. For example, if I am trying to maintain a tent or grow room environment of about 80f, why would I be drawing intake air from the outside that is 90+ or below 32? Remember, what works for you in a given situation might not work for someone else in a different home, in a different climate ... or even in a different country.

Edit: What I'm saying is much of this isn't determined by hard-set predetermined rules. Instead its decided by the variables you have to work with. In my professional life, we're always using outside the box thinking for engineering certain parameters into our industrial systems. For example, many industrial vacuum pumps have a "muffler" on the exhaust. However, if you replace the muffler with a flow control valve, you're now able to exercise better control over the vacuum system. It becomes a tune-able port instead of strictly an open exhaust.
 
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lvstealth

lvstealth

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He's in a spare room, no basements involved. Gotta start with what you have to work with

In a room, in a home, you have the home system to work with and the outside air. Inside is closer to stable, use that over outside air.

Exhausting out is so you don't have to "fix" that air. Exhaust out of your room. Outside works. But not back into your room your tent is in.

It is a spare room? Maybe 144 sqft? 200 would be a big room, but still small for air exchange purposes.

If you work inside, you need control of humidity and temp. It is easier, not debatable, it is easier to condition dry air.

Get a dehumidifier and a controlling system. Lots of folks like ink bird, I like smart stuff.

Not saying your system isnt hunky dory, just saying that presented with a room in a home, a dehuey and control of it will fix this issue.
 
MIGrampaUSA

MIGrampaUSA

2,087
263
He's in a spare room, no basements involved. Gotta start with what you have to work with

In a room, in a home, you have the home system to work with and the outside air. Inside is closer to stable, use that over outside air.

If you work inside, you need control of humidity and temp. It is easier, not debatable, it is easier to condition dry air.

Get a dehumidifier and a controlling system. Lots of folks like ink bird, I like smart stuff.

Not saying your system isnt hunky dory, just saying that presented with a room in a home, a dehuey and control of it will fix this issue.
No argument about what you just stated. I'm simply on a mission to bust inaccurate information.

The need to vent air outside or draw in outside air for intake is determined by the environmental variables you have to work with, the desire to control odors, etc ... not hard set rules. It's one of those things that depends on the natural environment the grow area sits in and how far it is from the ideal you're trying to create. There are times where it makes sense to consider venting to the outside, but there are also situations were it makes more sense not to. That's all I was trying to say ...

However, we will agree 100% on conditioning the air before its drawn into the tent as opposed to trying to condition it inside the tent.
 
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lvstealth

lvstealth

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Urm... Ok... But that wasn't implied, stated or otherwise prilificated.

He's in a room. He asked a question. Exhausting outside of that room is necessary to solve his dilemma. Exhausting outdoors seems better than into a home you live in...

A preachy thing on rules and quoting me as though I sponsor them... Not so great.

Only real rule I stated is that he needs a dehuey. Your sermon, I'm afraid, will diminish this point.
 
Anthem

Anthem

3,251
263
New indoor grower, living in Missouri (cold winters) I’m growing in a spare bedroom with 5x5x7 tent. Using a growers choice roi 720 for light growing in amended soil 4 plants in 1 gal buckets that I got as clones. Using an ac infinity t6 inline exhaust fan venting to a carbon filter that is sitting on the ground next to my tent. Had planned for the filter to hang inside the tent but with this light strength I need all the headspace I can get. Purchased extenders for the tent but don’t have enough height oh my bedroom ceiling. I have a humidifier inside of the grow tent. My issues are that while the light is running I have to intake cool air from outside of the house through the window just to get the temps down to 75-76 degrees. It’s usually below 40F outside so while the lights are off my tent will become too cold. I would turn the exhaust fan off during the dark time but if I do they my humidity will jump up over 60% maybe even 70%. I’m passively in taking from the window with a 6 inch tube just drawing in air from my exhaust fan that is feeding the carbon filter next to the tent. Do I need another fan or do I need to see my exhaust up differently? I’m about 1 week into veg with these clones.
Thank you to anyone that can help
60”x 60” tent. Roi 720 43”x43”. 17” to hang the fan and filter with only 4 plant still plenty of room
 
MIGrampaUSA

MIGrampaUSA

2,087
263
Urm... Ok... But that wasn't implied, stated or otherwise prilificated.

He's in a room. He asked a question. Exhausting outside of that room is necessary to solve his dilemma. Exhausting outdoors seems better than into a home you live in...

A preachy thing on rules and quoting me as though I sponsor them... Not so great.

Only real rule I stated is that he needs a dehuey. Your sermon, I'm afraid, will diminish this point.
Sermon? I respectfully disagree! Quoted above, you stated "always vent outside." Nope, sorry ... not a golden rule.

It's a situation that squarely falls into "it all depends," and a grower is far better off looking at the natural ambient environment and how they can bring it into the ideal range that their trying to create. You've been on this board long enough to see posts where a new grower can't figure out why they can't control grow room tents because they've over-thought the issue based on inaccurate or poorly stated advice.
 
lvstealth

lvstealth

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I say outside (of the room) not outdoors. I use these differences throughout. Then explained.

You just want to get away from the dehuey.

Go forth, be right

He still should invest in a dehuey and your sermon is wasted on me and he doesn't need it (he's not running a dehuey and is running $1k of light) he's not "there" yet. He's still at needing to be coached into purchasing a really decent dehuey.

Get a solid dehumidifier, set it up with a controller or some smart stuff and you will fix your issue.
 
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MIGrampaUSA

MIGrampaUSA

2,087
263
I say outside (of the room) not outdoors. I use these differences throughout. Then explained.

You just want to get away from the dehuey.

Go forth, be right

He still should invest in a dehuey and your sermon is wasted on me and he doesn't need it (he's not running a dehuey and is running $1k of light) he's not "there" yet. He's still at needing to be coached into purchasing a really decent dehuey.

Get a solid dehumidifier, set it up with a controller or some smart stuff and you will fix your issue.
How am I trying to get away from the dehuey? I USE ONE! You really need to go back and re-read this.

Zero harmful affects from venting filtered air back into the area that holds the tent. The only reason not to is if it over-heats the room. With that said, quantum boards produce more heat than an E720.

It sounds more to me like you're offended that someone bought a $1K light. I own the same light! I know how to use it. It's a great light to be honest, ... and NO, you don't need CO2 to use that light either.
 
lvstealth

lvstealth

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Oh my. It was a question. I answered.

Try it.

The guy has a spare room.

The guy has a decent light.

The guy needs a dehumidifier to answer his question.

If you disagree, Express it.

The rest of your sermon is...

Wow at the rest.
 
MIGrampaUSA

MIGrampaUSA

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I said remove the dehumidifier from the TENT, not the room! WOW .... unbelievable.
 
robertoj86

robertoj86

3
3
Thank you everyone for the advice. I have moved the filter to the inside of my tent and gave up the height in order to exhaust air out the window and intake air from inside the room. Also moved my humidifier outside of the tent too. Very good advice to condition the air inside of the room that is being drawn into the tent, much easier then conditioning the outside air that is ranging from 60f-28f right now from day to night. I had planned to purchase a dehumidifier once the humidity rises in my home, which normally doesn’t happen until spring/summer. While our furnace runs in the winter it keeps our house pretty dry, usually below 40%RH. The only thing I need to automate now is a possible small space heater, the room is dripping down to 67-68 while the lights are off.
 
robertoj86

robertoj86

3
3
How am I trying to get away from the dehuey? I USE ONE! You really need to go back and re-read this.

Zero harmful affects from venting filtered air back into the area that holds the tent. The only reason not to is if it over-heats the room. With that said, quantum boards produce more heat than an E720.

It sounds more to me like you're offended that someone bought a $1K light. I own the same light! I know how to use it. It's a great light to be honest, ... and NO, you don't need CO2 to use that light either.
Do you ever turn your lights up 100% during veg? I’ve just turned up to 75% at the beginning of my second week of veg. Just now becoming familiar with the light and the plants response
 

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