Wanting to Change to a sealed room but have a few questions

[BrightLights53]

ive read great things about sealed rooms and i love the idea of being able to have co2 ppms at a constant level. i currently am using a intake/exhaust room right now. with 4k and a single 8inch vortex with one scrubber at the beginning for each pair of lights. if i do decide to change it up i would be pulling air from the attic through the hoods and out in the attic again.
Question one - would one vortex 8 be enough to cool all 4 hoods with them all attached to each other?
if not, would i need to have 2 looping circuits for each pair of hoods or just get a larger fan to handle all 4?
and is it more efficient to pull or push with inline fans? ive always felt that it was better to pull then push but i have a buddy that swears up n down it is better to push. if someone could provide actual proof or specs of which is better that would be greatly appreciated as well.
Question Two - I am worried that the smell would become rediculous with no scrubber running, would i just have a scrubber hanging with a fan attached to it just blowing out and circulating the air in the room?
Question 3 - Does the humidity get extremely higher in a sealed room vs. intake/exhaust? i have a mini split that has a drain line coming out of the back of it that takes a decent amount of water out of the air and seems to of kept the humidity under control. if i changed to a sealed room would i have to get a dehumidifier as well?

 

[ttystikk]

ive read great things about sealed rooms and i love the idea of being able to have co2 ppms at a constant level. i currently am using a intake/exhaust room right now. with 4k and a single 8inch vortex with one scrubber at the beginning for each pair of lights. if i do decide to change it up i would be pulling air from the attic through the hoods and out in the attic again.
Question one - would one vortex 8 be enough to cool all 4 hoods with them all attached to each other?
if not, would i need to have 2 looping circuits for each pair of hoods or just get a larger fan to handle all 4?
and is it more efficient to pull or push with inline fans? ive always felt that it was better to pull then push but i have a buddy that swears up n down it is better to push. if someone could provide actual proof or specs of which is better that would be greatly appreciated as well.
Question Two - I am worried that the smell would become rediculous with no scrubber running, would i just have a scrubber hanging with a fan attached to it just blowing out and circulating the air in the room?
Question 3 - Does the humidity get extremely higher in a sealed room vs. intake/exhaust? i have a mini split that has a drain line coming out of the back of it that takes a decent amount of water out of the air and seems to of kept the humidity under control. if i changed to a sealed room would i have to get a dehumidifier as well?

Brightlights, nice to meet you!
1. Definitely you want to PULL air through the hoods with your fan instead of pushing. don't believe me? Set it up one way, feel the hood. Then set it up the other way. Your hand will tell you I'm right.

One 8" fan should be plenty to pull enough air to cool all four hoods. You sure you want to blow all that nice warm air up into your attic all winter? It could be warming your house!

2. Make sure this circuit is sealed up as well as possible. since it's pulling air from outside the room and exhausting it outside it as well, it need not pick up any smell at all.

If there is smell, THEN hook up your scrubber to the downwind end of the circuit. Remember, this circuit is not supposed to exchange with the air in the growroom.

3. Yes, the humidity will climb, and that's not altogether a bad thing. You want somewhat higher humdity values, but much over 75% at 80 degrees is too much. If your minisplit will condense enough water, let it. Otherwise, get a dehumidifier.

The most important thing to get for a sealed room is CO2 enrichment. Don't go sealed without it.

Hope this helps!

 

[cemchris]

1. If you can get away with it run the lights non air cooled. Less of a chance of the smell getting out. Only if your mini can handle the heat. If not I would run a scrubber on the end of the loop for the lights or something similar. No matter how much I sealed up my hoods seems like smell always got out.

2. Use a scrubber. Always use a scrubber or something similar. Unless you live out in the boonies and even then I would.

3. My humidity has stayed in check with a 24K mini. Veg it was around 60. Flower I cranked the a/c down a little and its floating around 40.

 

[BrightLights53]

Brightlights, nice to meet you!
1. Definitely you want to PULL air through the hoods with your fan instead of pushing. don't believe me? Set it up one way, feel the hood. Then set it up the other way. Your hand will tell you I'm right.

One 8" fan should be plenty to pull enough air to cool all four hoods. You sure you want to blow all that nice warm air up into your attic all winter? It could be warming your house!

2. Make sure this circuit is sealed up as well as possible. since it's pulling air from outside the room and exhausting it outside it as well, it need not pick up any smell at all.

If there is smell, THEN hook up your scrubber to the downwind end of the circuit. Remember, this circuit is not supposed to exchange with the air in the growroom.

3. Yes, the humidity will climb, and that's not altogether a bad thing. You want somewhat higher humdity values, but much over 75% at 80 degrees is too much. If your minisplit will condense enough water, let it. Otherwise, get a dehumidifier.

The most important thing to get for a sealed room is CO2 enrichment. Don't go sealed without it.

Hope this helps!

Nice to meet you as well ttysttik, thanks for all of the info!
1&2.) k, got it, pull over push. so if i were to be worried about smell i should put the scrubber on the end, so the fan side? so that the air being pulled through the lights is being pushed out of the scrubber, correct?

and yes i thought the whole heating of the house thing and it would be nice but im hoping that pulling very cool air over the lights will help me with keeping the temps more under control, seeing as how i only have a 12k mini split.

but if i was also still worried about smell, would hanging another scrubber with an 8in attached to it circulating and cleaning the air within the sealed room cause any issues whatsoever? i dont see why it would but im new to the whole sealed room thing.

3.) Currently my humidity stayed at about 50-60% and temps no higher then 75 and everything went great. the mini split would pull quite a bit of water daily. so i want to stay below 75%?

Co2 enrichment is a MUST, i want to get a controller for sure. was thinking fuzzy logic, but they are like 700 bucks. anyone know of anything a little cheaper that works just as well? or should i just not be cheap and get the fuzzy ha.

cemchris, i made the noob mistake of being cheap w my ac so i dont have the luxury of not air cooling my hoods : /.

and i stayed scrubbered out, i got like 6-8 of them everywhere.

do you use your 24k for both flower and veg?

 

[darlingmaster]

Your humidity will usually be ok with the AC when the lights are on, but when the lights are off and theirs not as much of a heat signal your AC doesn't come on as much and humidity WILL spike.
I run a 14k btu Mr.Slim in a sealed room and can tell you this from experience.

 

[BrightLights53]

thank ya, exactly the kind of info im looking for. so ill for sure need a dehumidifier for lights off? that makes a lot of sense actually seeing how my ac prob wont even be on during that and it will probably be running a little heat.

Darlingmaster, what do you do about smell, do you have filters inside the room? if so how are they installed.

 

[darlingmaster]

thank ya, exactly the kind of info im looking for. so ill for sure need a dehumidifier for lights off? that makes a lot of sense actually seeing how my ac prob wont even be on during that and it will probably be running a little heat.

Darlingmaster, what do you do about smell, do you have filters inside the room? if so how are they installed.

No, I don't have filters. I made sure my room is as sealed as humanly possible. No smell ever gets out. Until I open the door of course:surprised
My dehumidifier and mini split run as a "system". (I run a 70pt Frigidaire dehumidifier, btw)
I have it set for 50%. When it kicks on the hot dried air causes the AC to start up, which also starts to dehumidify the air as it's cooling, which makes the dehumidifier not work long and shuts of, which causes the AC to ramp down (its an inverter model). Sorry for the rambling, I'm stoned:rofl

 

[ttystikk]

Nice to meet you as well ttysttik, thanks for all of the info!
1&2.) k, got it, pull over push. so if i were to be worried about smell i should put the scrubber on the end, so the fan side? so that the air being pulled through the lights is being pushed out of the scrubber, correct?

and yes i thought the whole heating of the house thing and it would be nice but im hoping that pulling very cool air over the lights will help me with keeping the temps more under control, seeing as how i only have a 12k mini split.

but if i was also still worried about smell, would hanging another scrubber with an 8in attached to it circulating and cleaning the air within the sealed room cause any issues whatsoever? i dont see why it would but im new to the whole sealed room thing.

3.) Currently my humidity stayed at about 50-60% and temps no higher then 75 and everything went great. the mini split would pull quite a bit of water daily. so i want to stay below 75%?

Co2 enrichment is a MUST, i want to get a controller for sure. was thinking fuzzy logic, but they are like 700 bucks. anyone know of anything a little cheaper that works just as well? or should i just not be cheap and get the fuzzy ha.

cemchris, i made the noob mistake of being cheap w my ac so i dont have the luxury of not air cooling my hoods : /.

and i stayed scrubbered out, i got like 6-8 of them everywhere.

do you use your 24k for both flower and veg?

Right. Pull through the hoods, then fan, then push through the scrubber.

Wrong, do NOT pull 'very cold air' through the hoods- you'll end up making the lights run below their design temperature, which will cause them to spectrum shift their light output. NOT good. You want to run house temp air through the hoods- which works fine, the hoods should remain cool to the touch, certainly cooler than the room. Then, just push that air back into your house and watch your heating bill drop quite a bit.

I've seen people mount a fan and scrubber inside their sealed room, but I've never seen it do much good. Also, if the humidity climbs with that in the room, you'll just end up ruining all the carbon in the scrubber.

Humidity is a bit of a bone of contention around here. I run mine a little higher, but I live in a dry climate. I'd only run 75% humdity if my room temps were in the low 80s, which I'd only do if I were running CO2 enrichment. For temps in the mid 70s, humidity would be best set at 60-65%. For more on this, read up on VPD, or Vapor Pressure Differential. For flower, run at no more than 50%, and be prepared to water the shit out of your girls.

I have a Sentinel CHHC-4 fuzzy logic CO2 controller (it will control heat, cool and humidity too), and I would recommend it to anyone, as much for the customer suppoort I get from the company as for the gear itself, which performs very well. +rep to all the good peeps at www.grow-gps.com! So the question is, is a small extra investment now worth the extra yield and peace of mind? BTW, you can find the CHHC-4 down around $550 if you do some digging.

 

[BrightLights53]

Right. Pull through the hoods, then fan, then push through the scrubber.

Wrong, do NOT pull 'very cold air' through the hoods- you'll end up making the lights run below their design temperature, which will cause them to spectrum shift their light output. NOT good. You want to run house temp air through the hoods- which works fine, the hoods should remain cool to the touch, certainly cooler than the room. Then, just push that air back into your house and watch your heating bill drop quite a bit.

I've seen people mount a fan and scrubber inside their sealed room, but I've never seen it do much good. Also, if the humidity climbs with that in the room, you'll just end up ruining all the carbon in the scrubber.

Humidity is a bit of a bone of contention around here. I run mine a little higher, but I live in a dry climate. I'd only run 75% humdity if my room temps were in the low 80s, which I'd only do if I were running CO2 enrichment. For temps in the mid 70s, humidity would be best set at 60-65%. For more on this, read up on VPD, or Vapor Pressure Differential. For flower, run at no more than 50%, and be prepared to water the shit out of your girls.

I have a Sentinel CHHC-4 fuzzy logic CO2 controller (it will control heat, cool and humidity too), and I would recommend it to anyone, as much for the customer suppoort I get from the company as for the gear itself, which performs very well. +rep to all the good peeps at www.grow-gps.com! So the question is, is a small extra investment now worth the extra yield and peace of mind? BTW, you can find the CHHC-4 down around $550 if you do some digging.

alright nice, good to know about the cold air on the bulbs. was definitely new territory that i had never experimented with. Also quick question about bulbs, i know someone that likes to change their bulbs after every run to maximize quality. i thought that overall lumen output didnt decrease drastically until their death, but once again an area that i havent exp w. any input?

that is interesting about the scrubber as well, humidity kills carbon? weird. well smell is deff an issue so im going to have to have one possibly mounted inside the bubble or outside, maybe both.

humidity isnt to much of an issue here, i deff keep it 50% and in do my best for the low 70s and the more feeding the better! ha. more food for them, more food for me.

oh and yes, a co2 controller is a must. ill have it within days. That CHHC-4 sounds amazing, i originally was looking at the CAP PPM-2A Fuzzy. not quite sure if i see the point in controlling humidity and temp w the controller if i have a minisplit that does heat/cool auto. and if i get an auto dehyui for night time. seems like itd just be a bit overkill. One trait that i do like about it is the sensor that can be run inside with the controller outside in the CHHC-4, the 2a says it has a sensor but is the sensor built in or on a line like yours. if it isnt, do you know if an adapter available? bottom line, is the extra couple hundred bucks worth it? i have a few other additions that i need to be able to do as well.
but once again, thanks for all the input bro. i find sometimes it can be hard to get straight answers on things so its good to hear straight forward input from people that have experience in things instead of just walking into it blindly.