The following factors need to be considered when choosing an oxygen cylinder of the right capacity:
The user's oxygen needs: including the flow rate of oxygen needed per minute and the time of day the oxygen is used.
Portability: whether the oxygen cylinder needs to be moved frequently.
Environment of use: whether it is to be used at home, hospital or outdoors.
Duration of continuous use: how long the oxygen cylinder needs to support the use.
Usually, medical professionals will recommend the right capacity of oxygen cylinder according to the patient's specific situation. If you are choosing an oxygen cylinder for a specific purpose, it is recommended to consult the relevant medical professional or supplier for professional advice.