Grow set up problem. Tent by Gas Heater recirculation

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wakkawa

Member
Hey everyone.

I will be growing under my stairs in my basement, but the room has a gas water heater, and air condition unit in it. I will be using a Grow Lab 60. The air condition unit has a vent that vents out into another room. I don't have anywhere to exhaust the air, so I was thinking about having the tent recirculate the air. But I just wanted to make sure everything will be safe. Heat won't be an issue, I just want to make sure the gases aren't killing anything.

With the tent, proper inside tent ventilation and correct air flow, etc... in place will this be a safe place?

I will upload pics in a bit. Just want to get the thoughts going first now.
 
roidrage152

roidrage152

Active Member
you definitely need to bring air from outside of the tent inside. As the plants use the CO2 in the air, it will need fresh air to replace it and replenish CO2 levels. Just bringing in room air from outside the tent would be fire. In fact my friend had an old furnace vented poorly, and got ambient 1000ppm CO2 from it :). I think the rule of thumb is you want air inside your grow completely replaced every 5 minutes.
 
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wakkawa

Member
Thanks for the reply bro. So if the fans are pulling air through with proper ventilation going inside the tent, and properly releasing it in the same room with the gas heater should be fine? As long as everything is great on the inside?

The CO2 in the room should be a plus then?
 
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wakkawa

Member
Ok. I'm thinking everything will be fine. My Air conditioning unit is in this room, and the door to this room isn't completely sealed, and in this same room the AC is vented to another room in the basement.

Right by the AC unit is the gas water heater.

The tent is beside the gas heater. Its AC > Heater > Tent.


Tent will have air being pulled in, and pushed out. I want to have full proper ventilation inside the Growlab 60. Money is not a problem.


Anyone can give opinions? Venting into another room isn't an option, we're going sealed room.
 
E

everybodydoesit

Member
Wakkawa,
Good concerns to have bro. I would make sure you are NOT running negative pressure in your room. That would suck the exhaust gasses OUT of the gas heaters flue. I am thinkin youd rather not have you or your plants breathing those fumes. If for some reason you have neg pressure and your heater is less than perfect, you risk umm death from carbon monoxide. Total bummer.
Any HVAC professionals care to agree/disagree?
 
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wakkawa

Member
Greetings.

Thank you for your response. So. I will admittedly go ahead and say... how do I make sure I'm not running neg pressure? I'm sure there are some type of meters to buy to check?

Bummer, don't want to die from fumes. Is there a way I can overcome this, or if it even is a problem under the stairs I can build a small wall and exhaust into the little unders the stair sealed room pocket?
 
roidrage152

roidrage152

Active Member
everybodydoesit said:
Wakkawa,
Good concerns to have bro. I would make sure you are NOT running negative pressure in your room. That would suck the exhaust gasses OUT of the gas heaters flue. I am thinkin youd rather not have you or your plants breathing those fumes. If for some reason you have neg pressure and your heater is less than perfect, you risk umm death from carbon monoxide. Total bummer.
Any HVAC professionals care to agree/disagree?
Click to expand...

This doesn't make sense to me. If your flue is leaking any gas, then your problems are beyond pressure. I don't see any reason to not run negative pressure in your tent, especially if you are going to use carbon filtering. I'm sure the air around your appliances are perfectly fine. If you are paranoid about CO, then you can get a detector. I pump CO2 to my room with a gas burning tankless water heater. I have a CO monitor for safety, but its never peeped. Checking for negative pressure in a room is as simple as making sure the air is being sucked in through the intake. I use the flame from a lighter, or smoke from a cig. As in hold the lighter or cigarette by the outside of the intake, and see if the flame or smoke goes in from the air flow.

Inside the tent I would have a fan blowing air out, with a filter if you are concerned with smells,and a passive intake which is as simple as any size hole smaller than the hole going out. The air outside the tent should be perfectly clean and safe assuming all your appliances are up to code.
 
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mrmadcow

Well-Known Member
if you are venting the tent outside the room that has the gas appliances & dont have an intake into the room,the room will develop negative pressure & can suck the air from the chimney. as long as you have a good passive intake into the room and/or are venting into the room,you should be fine.
 
W

wakkawa

Member
roidrage152 said:
This doesn't make sense to me. If your flue is leaking any gas, then your problems are beyond pressure. I don't see any reason to not run negative pressure in your tent, especially if you are going to use carbon filtering. I'm sure the air around your appliances are perfectly fine. If you are paranoid about CO, then you can get a detector. I pump CO2 to my room with a gas burning tankless water heater. I have a CO monitor for safety, but its never peeped. Checking for negative pressure in a room is as simple as making sure the air is being sucked in through the intake. I use the flame from a lighter, or smoke from a cig. As in hold the lighter or cigarette by the outside of the intake, and see if the flame or smoke goes in from the air flow.

Inside the tent I would have a fan blowing air out, with a filter if you are concerned with smells,and a passive intake which is as simple as any size hole smaller than the hole going out. The air outside the tent should be perfectly clean and safe assuming all your appliances are up to code.
Click to expand...
Thank you all so much. Awesome, everything is good to go. So I need to make sure of course that the intake and the exhaust within the tent is operating on a consistent flow. Carbon filters and all that will be installed.

I will be doing exactly what you said roid, thanks again.

mrmadcow said:
if you are venting the tent outside the room that has the gas appliances & dont have an intake into the room,the room will develop negative pressure & can suck the air from the chimney. as long as you have a good passive intake into the room and/or are venting into the room,you should be fine.
Click to expand...
Great, thank you also for the info.



I can't wait to get this started because the space under stairs in the heater room was just tooo great of a place to grow.

I will be getting a CO detector too.





Weeeeeee. I will be growing Blue Satellite x OG Kush.
 
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