If you’re looking forward to coming back to a cool tent after a full day of adventures, you can certainly leave your unit on all day. However, there are a few things to consider if you want to do this. Your electric usage will be more than if you turned it off during the day. This might not matter if you’re staying in a campground with electrical hookups. However, if you’re powering your unit with a battery or a generator, you’ll need to monitor it closely.