Question about sealed greenhouse

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ganjourno

Member

• Apr 21, 2015

• #1

So I have had a fantasy about doing a sealed solarium type grow at some point - basically the best of both worlds between indoor and outdoor, where the glass room is still sealed like an indoor room and cooled with AC and CO2 is added. Naturally this would need a hell of an AC and Dehue... if the rules for indoor cooling apply (I go with 4kbtu/watt as a rule of thumb), then in a sunny area I can count on needing 4kbtu per square meter of exposed area. A 15ftx15ft solarium would therefore need about 8 tons of AC to cool it effectively. Yes a lot but about 1/4 of the power required for an indoor grow of the same equivalent wattage.

Anyone seen this done? Is there a better option for cooling? Air source heat pump?

 

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eighty9concentr

Member

• Apr 27, 2015

• #2

Google evaporative greenhouse cooling. A lot of the big greenhouse growers do it that way. Imo this is the future of growing. Climate controlled greenhouses. Saves a ton on over head and pumped with co2, temp and humidity controlled, people are killing it. It comes out like indoor. If you light dep you can run it all year and get 4 harvest out of it, 6 if you set up a veg one right next to it. Just add heat and supplemental lighting. A lot of start up cost but definitely pays for it self in the long run

 

Chunkypigs

passing the gas

Veteran

• Apr 27, 2015

• #3

solar heat/earth cooling

 

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floralheart

Active member

Veteran

• May 3, 2015

• #4

eighty9concentr said:

Google evaporative greenhouse cooling. A lot of the big greenhouse growers do it that way. Imo this is the future of growing. Climate controlled greenhouses. Saves a ton on over head and pumped with co2, temp and humidity controlled, people are killing it. It comes out like indoor. If you light dep you can run it all year and get 4 harvest out of it, 6 if you set up a veg one right next to it. Just add heat and supplemental lighting. A lot of start up cost but definitely pays for it self in the long run

Click to expand...

imo, a greenhouse is indoors. The plants are grown inside of something referred to as a house. Four walls, a roof... Does the flooring really matter?

 

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floralheart

Active member

Veteran

• May 3, 2015

• #5

Chunkypigs said:

solar heat/earth cooling

View Image

View Image

Click to expand...

Nice framing, if that's yours +1 for you.

 

Dready_jake

Member

• May 3, 2015

• #6

 

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eighty9concentr

Member

• May 3, 2015

• #7

Indoor uses lights instead of the sun, and the environment indoor is easier to control due to insulation. Theres a lot more swings in temperature and humidity in greenhouses because your at the mercy of what the outside conditions are. We have a couple greenhouse we dep in year round with supplemental lights, heat for winter, exhaust and intake fans on thermostats for summer, and co2. The indoor we do still comes out better. The run we pull down in july/august in the deps comes out the best out of all of them but the indoors still comes out a little better.