If you want your laundry to dry in less than two hours and still have the close be damp, then non vent. The non vented dryer uses condensation build up and tries to pump it down the drain. Not very efficient and does not work very well, but does sort of work. I consider it a only if it cannot be vented at all choice. If you want to be happy, choose vented dryer. We have a Splendid Washer/Dryer combo unit and are very happy with it. With the combo, we only use the washer then take the close out and shake them. High spin is never used unless you want permanent wrinkles. It would be good for socks and underwear only. I put three wool dryer balls in and use the coolest heat setting. It does a good job. We never dry the shirts or pants. We shake them out and put them on hangers. We have only used cold water, Costco laundry soap pods, and believe it or not dollar store softener with water in a 50/50 mix. Works well for us. Never, never direct to dry unless you like a lot of wrinkles in your closes. We tried it with the bath towels and boy were they wrinkled. It went directly into the high heat setting. Very dry, but man were they wrinkled badly. We don't mind the time it takes to do the washing and drying, because we only do one or two loads in the later after noon or early morning. Once the dryer stops, you got to get the close out asap so they will not have the wrinkles set in.