I have my grow tent in my loft. (OK not ideal but needs to be hidden)
My setup is as follows:
1.2x1.2x2m bud box pro tent
6inch rvk 430m3h fan
6inch carbon filter
720watt adjustable full spectrum led light
2x 20cm oscillating fans
4inch intake fan 280m3h with controller
Light schedule 20/4
Off at 12 noon and on again at 4pm
My exhaust soundproof ventilation is running 7mtrs to the opposite wall and exiting through to outside building, my active intake is within the portal at bottom and again running 7mtrs along floor to the same wall as exhausts exit but 2mtrs below it.
In summer I was struggling with high temps as you can imagine.
Now its got colder im finding during the early hours my temps are low as 20 degree’s whilst lights are on!
Ive decided I want to remove the externally run intake and instead run it to a small closet that used to be the cylinder room/airing cupboard so Im never pulling in low temps like 9 degree’s or even lower as they will be soon.
Im going to use a light domestos bleach mix to clean walls, ceiling and floor. I have a good 1-1.5 cm gap on the cupboard door at the bottom to allow house ambient temps to get it.
I can’t add holes or grills to the door as this will raise suspicion.
Can this be done?
My other option is to simply pull intake through the roof space itself (even though temps will be colder up there in winter) and to add a 45 watt tube heater with a temperature plug tiner that has a lead to measure heat within tent (so its set to minimum 21 degrees and max 27 so it turns on and off when needed) obviously id need 2 of the above so one runs during lights on and 1 runs during lights off.
That sounds like an improvement.
The 1.5cm under the door is roughly equivalent to a 10~12cm hole so that’s good.
Any idea on the volume of the closet? (to calculate air change frequency)
Also could you run any equipment in that closet? I’m wondering about a humidifier in winter and possibly a dehumidifier in summer. (If feasible, you could treat the closet as a mini lung room).
How is your tent intake and exhaust setup. If you intake and exhaust on the floor of the tent, you’ll save some heat. If you intake cold air up top and exhaust down below your cooling the tent air, same with intake on bottom exhaust up top.
My understanding is tents don’t have to be vented 24/7. I think, you can have the vent fans running only a few hours a day and still hit needed CO2 exchange. If your using venting to control your humidity, maybe add a humidifier and drop the vent time and both will make the tent much warmer.
Also my tent drops to 60f at night. If does slow growth. But plants can handle down to 45 ish before damage. Plenty of outdoor plants live through 40-50f nights
Plus your leaf temp might be higher than your air temp.
Yes that was my intention, i think i may have explained it wrong in my 1st post. I want to use the closet as a lung room so im pulling stable air temps from house. The closet is backing onto a bathroom and had water damage a few years ago, but i was thinking of bleaching all walls floor and ceiling then wrapping in mylar. There are dogs in the house so ill have to have a pair of tights tightly streched across the 750mm wide door bottom to stop any cross contamination
Check out this chart. The mold zone is really close to the grow zone. Especially early veg when humidity is kept higher. If no mold exists, mold conditions aren’t very risky. If there was mold from water damage in the closet, it will likely come back unless treated with ozone. Just my opinion though
