A question from a fellow grower:
Having a problem with humidity, running about 22-28%. I live in a dry place. grow area is 2.5 feet x 4.5 feet x7 feet high. 400w MH. eventually serving 4 plants. Have any quick fix ideas. 4 real leaves on plant. about 1.5 weeks old.
You need at least a 290 CFM inline exhaust fan to pull the heat out and a 6 inch duck fan or another inline fan maybe 190 CFM to bring cooler fresh air in over the plant .
Adding a humidifier will fix the problem immediately -good luck
I agree with both of these of these fellow grower’s
Nest of luck