Supplementary oxygen cylinder: Oxygen can be delivered to your home in the form of compressed oxygen. The compressed gas is stored in steel and aluminum storage tanks or cylinders. The larger water tank is fixed and can be used at home. At the top of the cylinder, there is a place for the "regulator". This is a device that regulates or controls the airflow from an oxygen cylinder or an oxygen cylinder, usually 1 to 15 liters per minute. Your oxygen supplier will provide the number of gas tanks or cylinders you need every week or every two weeks.

　　Oxygen concentrator: medical oxygen concentrator can also be used at home. There are "low flow" concentrators, which can deliver 1 to 5 liters of oxygen per minute, and "high flow" concentrators, which can deliver up to 10 liters of oxygen per minute. The oxygen concentrator is an electronic device the size of a coffee table. It concentrates the oxygen in the air by removing nitrogen, then concentrates the oxygen, and then sends it back to you to breathe through a nasal cannula. This method is low cost and easy to maintain because there is no need to refill the water tank.

　　However, the oxygen concentrator can emit heat and be noisy, and can greatly increase your electricity bill. In the event of a power failure, you still need a backup oxygen source, so make sure you have a gas tank on hand just in case. The humidification bottle can be connected to the concentrator to add moisture to the dry air delivered by the concentrator.

　　When you need more than 10 liters per minute, you can connect two concentrators with a Y-connector to deliver more liters per minute.