Window Ventilation

For starters this is my first post and my first PERSONAL INDOOR grow. In the past I’ve helped others out and I usually grow outdoor, so I’m just hazy on a few aspects of the indoor growing operation, like ventilation. I heard the build of heat will stun my plant/ not allow it to grow as well as it should. Any and all knowledge is appreciated, but my main concern for this post is if I have adequate enough ventilation for my “closet indoor grow op”?

I have a window in this walk in closet and if I keep it open with a screen and all walls & everything covered up in Mylar except for the hole by the window for air to come in/out.. would that be sufficient ventilation? Too add to help with the question I am only planning on growing a few plants maybe just one plant ... I will also be having a fan inside as well.If I need to cut different holes for air to come in like the window hole and a hole in the front for air to leave let me know please!!! I’m a novice in this exact aspect of growing ... I hope this is enough information to properly answer my question, I will also send a few pictures of what I’m talking about as well.

Ps if you need anymore info let me know, and the window is in a spot so I don’t mind the smell or have people to worry about!
Thank you and Bridge the Gap

How much ventilation you require is largely dependent on how much heat you need to remove. That depends largely on lighting. What kind of lighting do you have?

You will need to cover the window for light leaks and install an exhaust blower. You will also need a passive or active intake for fresh cool air to flow in to replace the exhausted hot air. Exhaust hot air from up high, cool air in down low. How much of a blower you need depends on the ambient temperatures, it gets more and more difficult to cool the room the warmer the intake air is.

Lighting will be a 2ft Ultra Grow T5 fluorescent fixture with (2 lamps) 24-Watt T5 Blue Linear Fluorescent H/O 6400K Full Spectrum .. I know this is just for vegging and I need 3000k for flowering, this is just the fixture i have so going to use it fort first grow I guess ... yeah was going to block all light leaks to the best of my ability ... and so I need a blower and an intake ? It wouldn’t be possible to grow a healthy big plant with blowing the hot air out the window and blowing fresh air from the bottom? Or something to that effect? I was really trying to grow without doing all that Intake and exhaust or blower stuff ... like if the vent to the window was always blowing in fresh air/ or taking out the air from the little growing section I have (because I’m just using the corner of the closet) and I added fresh air from fans and without letting outside light in I could open up to let more out air out and do that a lot to keep it not so stuffy would that still be workable ?

Or another thought since the window is up .. bring cool air from there and then blow hot air from the bottom or middle of the grow area ( I know you said hot air from top and cold air bottom ... but the window is up at the top) what do you think is the best way

If you get a small fan going opposite the window, on the far side of the plants, you should be ok. Not too strong so the plants are only wiggleing a bit. The open window itself might be ok as long as you twist the stems every once in a while to promote strong stem growth but during flower you'll really have to keep an eye on the humidity and make sure there's constant air flow to prevent mold.

You'll be fine with that setup as long as smell isn't an issue and it's not too humid during flower.

If this might help .. the dimensions that I’m using is 20inches long and 28 inches wide and 70 inches tall (just a portion of the walk in closet for one nice plant) it is right next to the window so if I get the hot air blowing out from there and circulating air from the bottom as well would you think that would suffice ... I will buy a thermometer to keep an eye on the temperature and yes don’t want mold , thank you all for the advice !!

If that's where all your hot air is leaving the house from, it could get pretty toasty. Consider a strain that's designed for high temps. If that spot is your only option it should be ok, you'll just have to plant her and adjust the environment best you can as she grows.

I don't think you mentioned temps, indoor or outside, so I can't really suggest where to direct or draw your airflow

Sorry it gets to the 80s even 90s since it’s summer but we’re in last phase of summer I would say (so-cal) and I haven’t even set everything up so by the time I have my stuff planted the temperature I know will lower , and it gets quite stuffy in the house since it’s an old time of structure with no a/c as well so I hope that hell’s and for the inside temp especially in that closet ... anywhere from 80-95, I wasn’t even going to really worry about all This but the more I look into it ... I don’t want to have such a stunned plant that it doesn’t produce a healthy plant in the end when it comes time to flower

Tricky, 95 is quite hot but 80-85 would be fine. You might have to do something like switch from exaughst out the window during daytime and intake at night. Others can help better than I can I'm sure, I've hit the limit of advice I can confidently give you, good luck man

Ok I have done multiple research and have came to the conclusion I shall use my window as a spot to exhaust the hot air out (keeping everything blacked out and airtight sealed to the best of my ability of course!) Seeing how small my space is I feel like I’m doing the math wrong ... my grow space is 2x3x6 ... either way I strike the math that everyone says to do I’m coming up with less then 200 Cfm .. and mind you I am having a t5 light and only a few plants so doubt I’ll will be generating a whole lot of heat.. my question now is do I have the math somewhat accurate .. I came up with three different answers from my equations 12 cfm, 68cfm , or 168cfm .. either way I do have a bit of a stuffy closet since it’s the ending of summer .. is the math some what correct and for a small grow operations which inline fan do you think I should get .. there are three options I will post the pictures of each .. they all seem decent and I’m sure the AC infinity would be the best but for price range and not trying to break the bank what do you think

I use a tiny usb desk fan as my exaughst in a 2x2x4 into a carbon filter. In my upstairs closet where it's stuffy. Passive intake from my bedroom. Just plant em and worry about that stuff later, venting really doesn't matter too much until she's in flower mode as long as there's a little bit of airflow. You'll be fine bro you're worrying too much, I promise.

Oh ok damn haha ok ok just wanted to make sure I can make fat daddy nugs like I did outside by yeah was only growing 2 to flower the rest I will move outside and flower outside but imma veg a few inside

FLV_Flavis said:

Oh ok damn haha ok ok just wanted to make sure I can make fat daddy nugs like I did outside by yeah was only growing 2 to flower the rest I will move outside and flower outside but imma veg a few inside

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Lol well that makes things much easier dude.. You'll 100% be fine to veg on there, I wouldn't even buy the inline fan just an oscillating cheapo. If you do flower 2 inside I recommend flipping before January so it doesn't get humid at the end.

FLV_Flavis said:

just wanted to make sure I can make fat daddy nugs like I did outside

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You won't.. Sorry but I wouldn't get my hopes up with t5's, wood walls(non reflective and absorb heat) and as a first time indoor grow. Should be good but not "outdoor" good. Just saying.

Yeah that’s what I’ve been hearing t5’s aren’t the best but it was a fixture I already had so buying the bulbs are cheap and figured for the first time .. I’m also buying Mylar to put on the walls to help with light absorption and what not.. curious can I get good nugs if I veg the plant long enough to be big cola when it flowers or will the light be in-adequate to grow fatty colas (and I will switch light bulbs for flowering) yeah it will be a small op I mean I may grow the plants a bit tall since I have the space height wise. But thanks for the clarification brother