Nighttime Temps

[dorjewright]

My dehumidifier keeps the nighttime temps about the same as the daytime; 75+/-; rh 45. I understand from searching, keeping the day and night temps about the same helps control stretch; but the general recommendation is a 10 degree difference. I'm trying to keep moist air from the room so my nighttime exhaust control is set at 75. I could try maybe 70. Pm is a was a major problem last grow so I'm really trying to keep the rh around 45. Am I creating a problem with these higher than recommended temps?

 

[rick ratlin]

Sounds like my temps and humidity, usually 75 day, 70 night due to ac. 75 degrees holds more water at 45% than 70 degrees, but I don't see a problem, unless you are heating up the water in the reservoirs if you run hydro, pathogen issues occur then.

 

[true grit]

I would not think so. My goal is to have a temp drop of no more than 7-10 degrees of my daytime temp. The biggest thing to prevent PM will be consistent RH control. The big swings in rh from night/day is what leads to the pm. not necessarily a too high RH. For example mine stays between 50-60% the whole cycle and temps usually go from 75-8 degrees night/day.