Morning Camp, glad you stopped in, yeah, I do both, vent outside an inside whatever the weather is. We been havin extremely low humidity, I'd vent back in the bedroom then, good weather like we are having now ,I vent outside. I always draw fresh air from outside.. My timer comes on an off every 15minutes, on my exaust fan ,everything is doing fine now. Plus they are flowering an I kinds hope it stays low for a little while longer.