jeezus, I take the Queen's flamin' birthday off and I come back to 240 message per hour scroll!

Quote Originally Posted by PharmaCan
Al's instructions said to take big clones so that's what I did. If this comes down to the blame game, I'm not leaving him any outs. LOL
If big clones with thick stems don't work better for you than tiny little snips with the leaves cut in half (the only POSSIBLE way cloning can work, I was told 10-odd years ago... ), I'l eat my hat and BBQ a couple of felt fedoras for dinner. Fat stems root faster and more profusely. Thing is, the old (pre-HID lighting, mainly outdoor) grow guides didn't want you taking cuttings from mainstems as those would produce the best buds. Cuttings were best taken from lowers that wouldn't produce much anyway.

Quote Originally Posted by criom
the humidity stays at 45% (i dont know why) and the temps rise to about 90-100,
If you have a second hygrometer lying around, do a quick comparison, make sure none are lying. Happens from time to time.

Could also have an awful lot to do with this curve.

Notice what happens to RH when you're approaching 38-40C (100-105F). The amount of water you need in the air to increase humidity rises logarithmically.

The air just might be able to hold all the transpired moisture the plants can put out between 3-hourly ventilations and yet not exceed 45% at 90-100F. :jawdropper: (but it's a dryyyyyyyyyy heat! )

Astonishing. Wouldn't have expected that.

I've run CO2 before, but always have had dedicated aircon units set for about 85F, which dealt with the humidity- or so I thought. Seems high temp alone may have been enough to control the RH... but these ops were 8 and 10kW, impossible in the spaces used without aircon, so I don't have a comparison base.

ive done one run with it and seen a 30-40% increase, so it seems like i could really pull alot if i had that last lumen/temp golden number dialed into my space.
Sounds like it!

what should the temp/humidity be at in your book?
With CO2, 85F, 90 max.

Quote Originally Posted by PharmaCan
According to those much wiser than me, temps in the 90's are just fine if you are using co2. As far as humidity goes, one needs a dehumidifier in a sealed room.
If the heat produced by the dehumidifier (and they make a fair amount, they are little aircon units) doesn't tip the room over 85 avg 90 max, it'd be a solution for a ventless grow. I rely on my dehumidifier to warm up my op in winter during lights off as well as keep RH under control.