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Window in grow room

truuuedef

New member
I live out in the country for starters, so I am not worried about neighbors.

I have a window that is forming condensation, ever so slightly in my grow room.

The grow room is a dedicated bedroom that has access to the houses 4ton trane hvac unit. The ceiling vent is closed 99%, so I am not blasting my heat into the grow room.

The room is 13 x 15 with a 10x10 tent in the center. It is tight. The 10x10 tent has an 8" intake from the closet on the far side from the window. It filters air into the tent. There is an exhaust fan and carbon filter inside the tent that is ducted and vents air out of the bedroom and into the hallway towards an air purifier before it reaches the central hvac return. Temps inside the tent along with humidity are perfect.

The humidity in the room (outside the tent) is staying around 34%, and 70-72F depending on if I am running the central hvac heater. I leave the ceiling fan turned on so I can have ample air circulation around the tent.

I noticed the 10x10 AC infinity tent is not going to be 100% light proof.

MY ISSUE:

I have some curtains on the window to somewhat black out the room. But I am getting condensation every so slightly forming on the inside of the glass in this particular room. How do I fix this condensation on the glass during winter, and keep the window blacked out from messing with my grow? I have 100 feet of panda film. But If I black out the window entirely, I'll have no air flow and lots of condensation forming here.
 
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truuuedef

New member
What would you do for the other side of this?

Cover the 10x10 ac infinity tent in panda film? And then I can leave the window curtains more or less cracked open. And then put a fan on the window?
 

truuuedef

New member
I mention the neighbors and being out in the country because I am also contemplating some form of blackout on the exterior window, however I don't want it to look bad. Any ideas?
 
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Hiddenjems

Well-known member
I’d put blinds in the window so that’s what is seen from outside. Then I’d airtight seal the window from the inside.

If you’re already using the whole room space, ditch the tent. The smaller the lung room in comparison to the tent, the harder it is to dial in temp/humidity.

I run some tents for cloning, veg, and plant isolation. But, my flower room is a 15x15 foot sealed room with co2, dehumidifier, ac, and a million fans.
 
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FTL

Well-known member
I’d put blinds in the window so that’s what is seen from outside. Then I’d airtight seal the window from the inside.

If you’re already using the whole room space, ditch the tent. The smaller the lung room in comparison to the tent, the harder it is to dial in temp/humidity.

I run some tents for cloning, veg, and plant isolation. But, my flower room is a 15x15 foot sealed room with co2, dehumidifier, ac, and a million fans.
This^^^

Put some absorbing crystals for wardrobes on the window sill.
Use net curtains or a roller blind then the curtains closed behind them.

seal the window with panda film
First layer, White side facing out window.
Second layer reversed white facing into room.

If you have a whole room to use and it’s dedicated to flowering(no mums) Ditch the tent.

Check widow sill every few months to replace water crystals and check for mould or water condensation damage/build up.
 

Orange's Greenhouse

Active member
You have 33 % humidity and get condensation on the window? That sounds odd.

Check if you hygrometer is working correctly. Either compare to other good quality ones or calibrate it.
To calibrate you make a super saturated solution of table salt. That is water (prefereably RO) with so much salt that is doesn't dissolve but forms a layer at the bottom. Put a cup of that slurry in a plastic bag with the hygrometer and seal it. After about a day to equilibrate it should read around 75 % at 20 °C.
 

Mastiff

New member
Hi, im not sure if my help will be usefull here but, maybe can you try with less spend of money using something like some strong adaptable seed with a kind of soil that fix the condensation?
 

Hiddenjems

Well-known member
You have 33 % humidity and get condensation on the window? That sounds odd.

Check if you hygrometer is working correctly. Either compare to other good quality ones or calibrate it.
To calibrate you make a super saturated solution of table salt. That is water (prefereably RO) with so much salt that is doesn't dissolve but forms a layer at the bottom. Put a cup of that slurry in a plastic bag with the hygrometer and seal it. After about a day to equilibrate it should read around 75 % at 20 °C.
It’s 33% at room temp. As temp falls rh increases until condensation starts. It’s easy for a 20*F window to get some condensation in an otherwise dry room with poor airflow.
 
I live out in the country for starters, so I am not worried about neighbors.

I have a window that is forming condensation, ever so slightly in my grow room.

The grow room is a dedicated bedroom that has access to the houses 4ton trane hvac unit. The ceiling vent is closed 99%, so I am not blasting my heat into the grow room.

The room is 13 x 15 with a 10x10 tent in the center. It is tight. The 10x10 tent has an 8" intake from the closet on the far side from the window. It filters air into the tent. There is an exhaust fan and carbon filter inside the tent that is ducted and vents air out of the bedroom and into the hallway towards an air purifier before it reaches the central hvac return. Temps inside the tent along with humidity are perfect.

The humidity in the room (outside the tent) is staying around 34%, and 70-72F depending on if I am running the central hvac heater. I leave the ceiling fan turned on so I can have ample air circulation around the tent.

I noticed the 10x10 AC infinity tent is not going to be 100% light proof.

MY ISSUE:

I have some curtains on the window to somewhat black out the room. But I am getting condensation every so slightly forming on the inside of the glass in this particular room. How do I fix this condensation on the glass during winter, and keep the window blacked out from messing with my grow? I have 100 feet of panda film. But If I black out the window entirely, I'll have no air flow and lots of condensation forming here.
Double glazing mate

Probably not the answer you were looking for but, the cold glass panel captures humidity from your room, as long as the other side of the glass is cold, it will capture water vapor from the air, so another layer of glass fixes all of that
 

Orange's Greenhouse

Active member
It’s 33% at room temp. As temp falls rh increases until condensation starts. It’s easy for a 20*F window to get some condensation in an otherwise dry room with poor airflow.
His dew point is 4 °C. If the window gets so cold at just -6 °C outside then the window is shit and should be replaced.
 

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