This is something I could probably figure out over time but there’s a lot of experience here so I’m not going to try and reinvent the wheel.
The problem is ventilation and temp. Initally I outfitted my grow tent with a 4 in. duct fan plus carbon scrubber. For lighting it was a 5/250 watt LED multi spectrum array plus 2 - 3/50 watt blue/white side lights. After frying a few seedlings in pots and boiling some in DWC and finally getting some good advice I tossed the duct fan in favor of a 4 in. 190 cfm vortex plus carbon scrubber. All said and done I can open the vortex fan up to the point it will almost pull the sides of my 3’ x 3’ x 6’ grow twwnt together. All that suction and with all lights on I’m still getting a balmy 80 - 82F tent temp and 76 +/-1 room temp around it. The RH hangs around 45% which I can boost to about 50% with the bottom of a 10" x 20" propagation tray of water and about 65 - 69% with a cool mist humidifier.
Of course this all boils down to the need for an air intake in the tent. DUH!! What I need to ask is, tapping into the corporate memory now, what design and placement might be best for said intake where it doesn’t screw anything else up? Right now I only have a few new clone sets in residence but, hopefully, it won’t be long before those clones or some sprouts - if I’m ever lucky enough to receive some seeds despite the meddling A-holes of Customs and Dept. of Agri. - ready for hydro. So the situation isn’t too extreme for the clones just now. (With the exception of 1 the last setting of clones went extinct with 85F peak temps and the fact I couldn’t keep enough moisture to them to keep the coco coir plugs from drying out.)
Peace and Happy toking.