Liquid oxygen is contained in thermally insulating tanks. The liquid has to boil changing into a gas for breathing. Large tanks are used by hospitals. Small tanks can be used domestically. Liquid oxygen tanks are refilled by liquid oxygen suppliers.
LOX LIQUID OXYGEN SYSTEMS HELIOS LIQUID OXYGEN SYSTEM SERVICE AND REPAIR
• Puritan Bennett Model: 21a, 31a, 41a Stationary units
• Puritan Bennett Model: Helios Standard and Universal U36 U46 stationary units
• Puritan Bennett Model: C1000, 550, 500 portable units
• Puritan Bennett Model: H-300, H850 Marathon portable units