My wife and I have been living life to the fullest in a camper van for six years. My friend bought it and highly recommended it. I've carried a Sears supercharger with me through the years. Do you need to ventilate? Turn off shore power or generator. Not so with this amazing device. We stood for a year while I built the garage. The tires dropped to 60#. It took 2 1/2 to 3 minutes per hoop to get them to the 80# required per hoop! When you look at the device, laugh and say no! Then plug it in and be stunned! That works great. Thank you for such a wonderful product. I highly recommend it! You will never regret it!