Dry-Room Setpoints, VPD & the Real Endpoint
Slow, cool, even moisture pull steered by VPD and dry-back weight — plus the water-activity endpoint that stem-snap can't give you.
9 min read
"60/60" is a starting point, not a spec
The industry shorthand 60°F / 60% RH lands you inside the window, but temperature and RH interact: 60% RH at 65°F pulls water very differently than 60% RH at 80°F because warm air holds far more moisture. Serious ops therefore steer by VPD and by dry-back weight, not RH alone. The goal is a slow, cool, even pull that moves moisture from the core to the surface faster than the surface can crust over.
The rest of this lesson is for members
Unlock every department, SOP, calculator, and setpoint table — plus Leaf, your AI consultant, and interactive diagnostics.
- All 11 departments
- Coco & rockwool tracks
- The full SOP library
- Leaf AI consultant
Unlock full access membership from $490/yr · or own it for life