Need help!

Can I run just my oscillating fan at night and no exhaust? My humidity seems to drop as I run my exhaust at night to levels that aren’t good for veg. I normally run a humidifier but it’s starting to get like 65 degrees at night and I’m worrying that’s too cold. I don’t run an intake, I use the negative pressure method

Air-circulation & ventilation (neg-pres) run 24/7 here, gets cold in winter too.
I only run the dehumidifier when necessary, like now It's pulling 3 or more gallons a day.

Good luck

You can plug it into a timer and have it run whenever you’d like it to. I’d want to keep it running though. That’s how you get fresh air into the tent for the plants. At least on the lowest setting.