Sealed Room With LED

Dank- you've made this a very useful thread. Look at all of the input from others you've encouraged. Really helps me a lot.

I very much like the idea of a more passive approach by simply exchanging the hot air in the grow with the cooler air of the rest of the house.

The vents out of the room would be a problem, let's just say. So the sealed system offers the best potential for me, except it's at a cost of AC and de-hum.

What I'm hearing is that:

- The LEDs are still hot enough to require a cooling plan. Like Dank is doing.

- Humidity would HAVE to be a problem in any sealed room, regardless of light source. You're adding gallons of water to the room per day. Running the dehumidifier will only add to the heat.

- CO2 supply can add some humidity and temp tolerance, but not enough to run sealed.

- Cooling units within the room create heat, and since I have no windows, I'm looking at a mini-split running 12 months of the year and building a snow shelter over the outside condenser.

- Maybe in the winter I can somehow get some cool winter air in there to cool...

Rrog said:

Dank- you've made this a very useful thread. Look at all of the input from others you've encouraged. Really helps me a lot.

I very much like the idea of a more passive approach by simply exchanging the hot air in the grow with the cooler air of the rest of the house.

The vents out of the room would be a problem, let's just say. So the sealed system offers the best potential for me, except it's at a cost of AC and de-hum.

What I'm hearing is that:

- The LEDs are still hot enough to require a cooling plan. Like Dank is doing.

- Humidity would HAVE to be a problem in any sealed room, regardless of light source. You're adding gallons of water to the room per day. Running the dehumidifier will only add to the heat.

- CO2 supply can add some humidity and temp tolerance, but not enough to run sealed.

- Cooling units within the room create heat, and since I have no windows, I'm looking at a mini-split running 12 months of the year and building a snow shelter over the outside condenser.

- Maybe in the winter I can somehow get some cool winter air in there to cool...

Click to expand...

A Hybrid room solution would not be a bad idea, even in my case where once everything is set to automatically ensure a consistent optimal environment being sealed should I suffer a failure to the ductless unit in the room or even a condenser failure or lose power (that is where I don't have redundancy yet and would want) if I can move in fresh air and CO2 builds or I have too low levels until power is restored a way of bringing in fresh air and evacuating it would be great to have available. So I will keep connections to fresh air and exhaust vent through roof via attic as backup, if need be attach hand peddle crank on a fan blades and use true man power to cycle air if need be....

Anywise glad I can help, the duck stat works as a charm my temps in flower never got above the max limit, I did not have to keep the exhaust fan running 24/7 so when lights are off and girls sleeping no warm air to keep them comfy is being exhausted out. The speed step controller is key to allow longer run times on fan so it does not wear out to quickly from short repeated power cycles.

The temp lowest got to 72 while the rest of structure in mid 50's. That is efficiency I did not loose that heat energy from lights and dehumidifier and one large wall fan in the room while not having to keep heat up in rest of structure.
That is great news! I good $20 investment. Not to mention the adjoining veg room with its lights running did not dip below 70 or get above 75. Granted I am getting this now not using a mini split but the temps outside are in low 50's to high 40's nor running six lights in flower only 2. I will have to go mini split by spring for there is now way I can fully utilize grow room both veg and flower with fresh air circulation and not incur heavy AC pays and attract attention by some smell getting through walls via air pressure difference.

Anywise all is good now with low light usage and cooler outside temps for current setup, mini split is required to combat heat, power, humidity, smell, yield potential with CO2 added. So gotta to pay the piper if I want something inside bigger then a clothes closet.

DankSwag

Hey RROG, I tried to beat the heat issue, without AC in a finished basement by switching to LED, using large tents and circulating all the air in the basement including the unfinished parts. I was able to keep canopy temps below 80F and CO2 levels skyrocketed (from us breathing upstairs) but humidity also skyrocketed. So now I use fresh air when it is cool and dry, then recirculate the inside air when the outside is hot or humid. When recirculating I have to rely on central air AC and or dehumidifier.

As far as smell goes, it is very hard to keep it under control when there is a very dank batch finishing up and especially when it is getting trimmed. I use DIY carbon filters and they work much better when humidity is low and when the carbon is refreshed (bake it on a campfire until it glows). I try to refresh the carbon every 3 or 4 months. Good luck!