Exhausting air from room during lights off

Can I exhaust air from the room with lights off to reduce co2 levels at night and lower humidity? Turn off the exhaust during lights on? With co2 burner running with lights on and semi sealed room.
Co2 is kind of high during lights off and humidity is high.

if you aren't already running co2 don't. co2 levels only need to be higher during lights on I've read

I've never used co2 i don't know anything about using it.
Co2 aside you/we have to keep ventilation going light on or off, we need to keep down humidity and change the air frequently to refresh it, in my case every 15/20 minutes during the dark period + dehumidifier running constant.

Star Dog said:

I've never used co2 i don't know anything about using it.
Co2 aside you/we have to keep ventilation going light on or off, we need to keep down humidity and change the air frequently to refresh it, in my case every 15/20 minutes during the dark period + dehumidifier running constant.

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Yeh I have a dehumidifier 205 quest but doesn’t seem to be enough for my dark period; humidity rises up to about 70’percent with lights off

I hope semi sealed doesn't mean it is exposed to a living area
Because you are playing with fire

co2 do not hurt during dark, they only use oxygen
if you live in a dry area and add a good xhaust .. yeah it will allow better control on humidity
if its often rainy and cold/humid it will not improve your situation

Herb & Suds said:

I hope semi sealed doesn't mean it is exposed to a living area
Because you are playing with fire

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Nah warehouse 2 rooms upstairs 2 rooms downstairs on and off with air swap between the two up and two down on n off method

Streetdoctor3 said:

Yeh I have a dehumidifier 205 quest but doesn’t seem to be enough for my dark period; humidity rises up to about 70’percent with lights off

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I've never been able to control humidity without a fan coming on intermittently at least + good temps (20c) when temperature drops humidity rises hence relative humidity (RH%)

Star Dog said:

I've never been able to control humidity without a fan coming on intermittently at least + good temps (20c) when temperature drops humidity rises hence relative humidity (RH%)

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Yeh I have temps ar about 20c at lights off; I’ll try to do intermittent fan thanks

Streetdoctor3 said:

Yeh I have temps ar about 20c at lights off; I’ll try to do intermittent fan thanks

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I'm not sure of intricacies of Co2, if temps allow I'd be venting constantly.

Star Dog said:

I've never used co2 i don't know anything about using it.
Co2 aside you/we have to keep ventilation going light on or off, we need to keep down humidity and change the air frequently to refresh it, in my case every 15/20 minutes during the dark period + dehumidifier running constant.

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Not true if you are using co2.
No fresh air is needed, the co2 supplies that.
Just have to worry about temp and humidity

Herb & Suds said:

I hope semi sealed doesn't mean it is exposed to a living area
Because you are playing with fire

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What do you mean?

Streetdoctor3 said:

Can I exhaust air from the room with lights off to reduce co2 levels at night and lower humidity? Turn off the exhaust during lights on? With co2 burner running with lights on and semi sealed room.
Co2 is kind of high during lights off and humidity is high.

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Co2 is only needed during the day.
Put your burner on a timer to turn off at night, and ventilate as much as you desire.
They only need ambient levels for night time.
Co2 does nothing unless the plants are receiving a extreamly high amount of light.
Otherwise they will grow the same at 500 ppm as they would at 1500 ppm CO2.

ÒÒlegilizeitÒÒ said:

Not true if you are using co2.
No fresh air is needed, the co2 supplies that.
Just have to worry about temp and humidity

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You should maybe read that again lol.

I've never used co2 i don't know anything about using it.
Co2 aside...

Star Dog said:

You should maybe read that again lol.

I've never used co2 i don't know anything about using it.
Co2 aside...

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Well you probably shouldn't interject your opinion if its completly irrelevant then
Why would you comment on a question about CO2, when you know nothing about it?

ÒÒlegilizeitÒÒ said:

Well you probably shouldn't interject your opinion if its completly irrelevant then
Why would you comment on a question about CO2, when you know nothing about it?

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What's your problem?

Can I exhaust air from the room with lights off to reduce co2 levels at night and lower humidity?

Do you want to try reading the op again?

ÒÒlegilizeitÒÒ said:

Well you probably shouldn't interject your opinion if its completly irrelevant then
Why would you comment on a question about CO2, when you know nothing about it?

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"What do you mean ?"

@Star Dog My understanding is that you can vent during the night as you are fine with normal c02 levels than. I've read of lots of people doing that and tying in a switch so you are able to walk into your room during lights on if that makes sense.

In my opion (as someone who has never ran co2) yeah it's nice that you are still able to vent at night. But why don't you have a way to keep temps and humidity down all the time anyways? co2 to me only makes sense in a sealed environment. it's nice if I can unseal it but I should never have to to maintain my environment.

(feel free to say that I'm wrong Its part of the spice of life)

I have a 6” duct booster that runs during my lights off. It keeps my humidity in check at night. Also stops cold winter air from coming back down my ducting.
But this is in a tent not a big room