Ventilation...???

[Jkrcarp]

I am building a 250 sq ft flower room. It is sealed airtight and in a basement in michigan. My question is: if I am dropping co2 and using LED (cool) lights do I need to ventilate? And if so, how do I drop co2 and ventilate with out sucking the co2 out of the room? The room is stable and cool I may have to add heat and humidifier or dehumidifier in the summer. Ty in advance!!

 

[CrushnYuba]

You have too vent or condition the air. A watt puts out a watt of heat. Doesn't matter if u fill that room with 10k of hid or 10k of led. You will have 10k of heat.

 

[PurplePotion]

You’re going to need an air conditioning unit if you need to bring temps down. Mini splits are efficient, but you could make due with a portable or window unit sized properly. Otherwise you will suck all of the added co2 out of the room unless the fans and co2 are very carefully controlled and your intake air temps are very low... this might work for you in the winter but not the rest of the year. If you want to stay sealed, invest in a good A/C.

4-5k btu per 1kw is a good rule of thumb.

 

[Mars Hydro Led]

I am building a 250 sq ft flower room. It is sealed airtight and in a basement in michigan. My question is: if I am dropping co2 and using LED (cool) lights do I need to ventilate? And if so, how do I drop co2 and ventilate with out sucking the co2 out of the room? The room is stable and cool I may have to add heat and humidifier or dehumidifier in the summer. Ty in advance!!

LED can help lower the temp a lot. Especially the new quantum board design. If you want to find an affordable QB LED, check our lights out.
http://bit.ly/30DesD0

i think Purplepotion's idea is suitable for you.

 

[CrushnYuba]

I'm pretty sure a watt of consumed power creates a watt of heat. A watt creates like 3.4 BTU. It doesn't matter if it's a LED, T5, HID, or electric heater. You would need about 10kw of HID light for 250sqft. I think you would need something like 7.5kw of led. So an led is a little less heat but Its still 75% of the heat of an HID. That's still allot of heat.
I'm not sure if it would produce as much as 10kw of hid. Maybe it would.

Maybe I'm missing something, but that's how i understand it.

 

[St. Phatty]

Plants do WAAAY better with ventilation.

You can get personal med quantities without ventilation. But if you have a 250 square foot room, you're probably trying to get more than med quantities.

 

[Home-Grown]

I am building a 250 sq ft flower room. It is sealed airtight and in a basement in michigan. My question is: if I am dropping co2 and using LED (cool) lights do I need to ventilate? And if so, how do I drop co2 and ventilate with out sucking the co2 out of the room? The room is stable and cool I may have to add heat and humidifier or dehumidifier in the summer. Ty in advance!!

That size area needs ventilation, the designs are pretty global for all.

If we ignore all other factors, CO2 is heavier then air.
Exhausting air from higher has one logic.

Controlling the intake by returning 50% [FONT=Arial, Helvetica, sans-serif]e[/FONT][FONT=Arial, Helvetica, sans-serif]xhaust air[/FONT] with externally drawn air is another.
This will result in the room being hotter, but also even out sudden weather fluctuations.

Good luck

 

[MarDog]

Just throw a window banger in there and close the vent on the AC and bam your done..

 

[superpedro]

I'm pretty sure a watt of consumed power creates a watt of heat. A watt creates like 3.4 BTU. It doesn't matter if it's a LED, T5, HID, or electric heater. You would need about 10kw of HID light for 250sqft. I think you would need something like 7.5kw of led. So an led is a little less heat but Its still 75% of the heat of an HID. That's still allot of heat.
I'm not sure if it would produce as much as 10kw of hid. Maybe it would.

Maybe I'm missing something, but that's how i understand it.

If we just talk about physics you are right. That is the second law of thermodynamics.

But though energy can't go dissapear, it will get stored in the molecules by plant metabolism. This means the quality of light, the relative amount used by the plant, matters for heat.

The second variable, is how much water is evaporated inside your growroom since that draws energy as well. Yes, plant transpiration actually cools both air and plant. So does any evaporation device, where you dont use a heat source to evaporate.

 

[f-e]

Plants don't want co2 at night, they actually produce it. It's the perfect time to clear out the room of any unwanted airborne contaminates that a hepa filter can't catch.

 

[Douglas.Curtis]

Plants don't want co2 at night, they actually produce it. It's the perfect time to clear out the room of any unwanted airborne contaminates that a hepa filter can't catch.

Also Make sure your intake air is HEPA filtered, because you'll want to severely limit your incoming pollen and fungal spores.

Mini-splits with de-humidification work as dual-role. Michigan is very humid, so you'll want something which can handle the load. Any de-huey you put in the room will also add heat. The mini-splits have their heat generation outside the building.

 

[Student Of Life]

How many watts will you be drawing? Co2 burners produce heat, dehumidifiers produce heat, and lights produce heat, regardless of whether they're HID or LED. 250 sqft if enough room for ~15k watts in HID lighting, not sure what that translates into LED (10k?). That's alot of heat. Let us know how many watts in lighting you plan on using if you have that figured out.