blackonblack
Well-Known Member
I planned to build a very well insulated grow room (for my second grow) in a shed in my spacious backyard. I planned to line the walls with a high quality insulation to efficiently keep the room at optimal temperature without much heating or cooling. I live in Socal at the average temps by months are as follows:
Jan Dec
58.0 59.1 60.2 63.0 65.7 69.3 72.9 74.3 73.2 68.9 62.4 57.9
at night temps drop a lot in the winter time:
For my next grow I want to add co2 to the mix and to me it seems like with co2 you can reduce heating/cooling/ventilation costs. I know that without co2 the air should be replaced every 5 minutes to vent air depleted of c02 and to reduce humidity levels in the grow room but if you have to replace the air so quickly it's basically impossible to keep a temperature different than outside air (in my shed). I mean if the air is 50 degrees in the dead of winter and you have a heater running in the grow room, if you are continuously blowing air through the grow room... That is very inefficient power wise. You basically have an AC and heater running at the same time.
Here is what i was thinking. In a very well insulated outdoor shed that draws air directly from the outside. If I seal the shed completely off and run co2 for 1500 PPM that reduces the need to ventilate for reasons of co2 depletion. HOWEVER the humidity will quickly rise as the plants transpire until the levels rises to the point where they are choked off.
What If i hook up my exhaust fan to a humidistat (humidity controller) that will turn on when the humidity rises say above 60%. This way I can have my exhause fan only running when absolute necessary and i can incorporate a heater/AC unit to maintain temperature during the extreme times of the year.
I would appreciate any comments to help me figure this out. Thanks in advance!
Jan Dec
58.0 59.1 60.2 63.0 65.7 69.3 72.9 74.3 73.2 68.9 62.4 57.9
at night temps drop a lot in the winter time:
For my next grow I want to add co2 to the mix and to me it seems like with co2 you can reduce heating/cooling/ventilation costs. I know that without co2 the air should be replaced every 5 minutes to vent air depleted of c02 and to reduce humidity levels in the grow room but if you have to replace the air so quickly it's basically impossible to keep a temperature different than outside air (in my shed). I mean if the air is 50 degrees in the dead of winter and you have a heater running in the grow room, if you are continuously blowing air through the grow room... That is very inefficient power wise. You basically have an AC and heater running at the same time.
Here is what i was thinking. In a very well insulated outdoor shed that draws air directly from the outside. If I seal the shed completely off and run co2 for 1500 PPM that reduces the need to ventilate for reasons of co2 depletion. HOWEVER the humidity will quickly rise as the plants transpire until the levels rises to the point where they are choked off.
What If i hook up my exhaust fan to a humidistat (humidity controller) that will turn on when the humidity rises say above 60%. This way I can have my exhause fan only running when absolute necessary and i can incorporate a heater/AC unit to maintain temperature during the extreme times of the year.
I would appreciate any comments to help me figure this out. Thanks in advance!