14" screened wall vent with damper hooked to a 14" galvanized duct to a 14" centrifugal blower, sucking on a 14" galvanized trunk with 8" takeoffs, each takeoff with 2 or 3 hoods chained off it using flex...
Cut the ribbed bottom out of your trays, leave a rim around edges as tall as the humps on your ribs. it will hold water and you grow long bubble cloner type roots. ;)
Just passing on what I've had the best rooting rates with. Over 15 years.
I say 87-90f is where it's at. Slide the probe under the ribbed tray (between tray and mat)
I root like this in a 2X4 flood and drain tray under 250w HPS. The heat mat is placed in the tray, I plop several trays of...
It will always be hotter under the light than your ambient (intake) temperature. @Julius Caesar is correct, your fan is inadequate. Centrifugal blowers work best.
Schweet, I will experiment with this next time one of my clients has an outbreak. Too many other projects happening in the lab presently to bring HMV back into the picture. Lol
I did order my test samples directly from their website.
Assume the same amount of moisture in air... if air cools, the relative humidity rises since the cool air holds less moisture.
Also PM thrives in cooler temps.
Stay warm, I like my lights on at 83 canopy and my dark temps not drop below 80.
I use a heater in the winter to warm dark cycle as...