@stevelc Yes, 50’ is the maximum. What I use with my home concentrator are multiple tubing hoses in different rooms. During the day my concentrator is in my bedroom with tubing that goes from there to my living room where I usually sit. Overnight the concentrator is in the room next to my bedroom with a separate length of tubing. This allows me to minimize the concentrator noise and keep some sanity in my household. I do use my Portable Oxygen Concentrator when I need to get up to use the bathroom or grab food from the kitchen. I have a cart for it and it has about a 12x15” space for things. I use it for my water bottle (I use a zip tie to keep it upright) and miscellaneous stuff. I even put my laundry basket across the top of the cart to do laundry. I always like hearing how people adapt with their oxygen. I hope that there are people inventing ways to minimize the oxygen machine noise. My POC is loud too. They need mufflers! Good luck with your oxygen use.