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Sunshinegrower
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I'm not sure what you mean by not being able to get the outdoor unit with regards to CO2. I run indoor, water cooled burners to produce my gas and it comes out of the burner at 79 degrees F. You can run too much light if the plants can't use it, but you are talking about getting light below the canopy, and that is a good thing. You should really add the CO2 if you are going to be running that much light for so few large plants. They can only respire at the maximum rate if all the limiting factors are dialed in. CO2 is one of them.
Yeah the place I can't not have an outdoor condenser unit and I'm not going to buy some cheap or costly portable A/C. Yep I'm lighting from the bottom of the canopy so that little stuff becomes big stuff. I would love Co2, but if the room is exhausting all day I can't keep the Co2 levels up.
What about a window unit with a box built around condenser with fan exhausting the hot air from condenser? Just a thought. Or condensing unit inside with exhaust and intake to keep room cool where unit is?
actually there is such thing as too much light. That being said I dont think you are in danger of that with your setup if I understand you correctly. You can actually kill plants with light intensity but it takes a lot. That being said you could shock your plants inadvertently in your setup. I would recommend not switching from veg directly into full light. give them a week in the flower room, but keep the light cycle as you would in veg until they get used to the light. maby start with the overheads on for 3 days, then start turning the vertical bulbs one or two a day untill they can take the full light without getting all limp. Once you have all lights on and you can see that the plant is growing then flip light cycle. If you cant run your flower lights 18 hours for heat issues you can but another light in the room to keep the cycle regular for that week while they acclimate.
well if you say theres a such thing as too much light.. dial the sun down considering it produces trees compared to bushes indoors.. the more light, the more bud youll have, period. you just have to keep your temps in check.
What about a window unit with a box built around condenser with fan exhausting the hot air from condenser? Just a thought. Or condensing unit inside with exhaust and intake to keep room cool where unit is?
What would you think I would need for cooling BTU's running 8-1k in Raptor/Magnum XXXL 8" duct vented with cool outside air running on 650cfm exhaust fan and 4-1k bare bulbs, 1 -70pint dehumidifier? I know if the room will get in 100F if the exhaust is not working.. My guess is 16,000 BTU just from the 4-1k bulbs.
Okay on the window A/C and portable don't they exhaust the room air? So if I was running Co2 how would this work?
CannabisJohn knows his HVAC shit, if he has some ideas about cooling your room, I'd do some careful research on it. I'm thinking you could even run the air you're getting rid of from the hoods as cooling air for an AC unit. Make the condensor section the last stop on the way out of the room...
I think I can answer this one for you: I run a very similar lighting setup; 8 x 1kW in 8" magnum xxxl hoods, ducted and vented. I run a water chilled system in the room, but to answer your question about AC, no they generally don't exhaust the air they're cooling in the room, because that would basically defeat the purpose of the AC unit. If you can exhaust the warm air coming off the back of your AC unit, like a boxed window unit, and get that air out of the room, you'll be way ahead.
Those magnum xxxl hoods are very good at shedding excess heat with ducted air venting. You won't need as much cooling in the room as you might think to handle the residual heat from them. The 1kW bulbs you have mounted on the walls are of course another story...
All said and done, it would be a big step up in yields if you could get the room sealed and run CO2 enrichment. You're most of the way there already with the dehumidifier and vented hoods, so why not?
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