PROBLEM TO BE SOLVED: To provide a rental method for oxygen enrichment equipment which reduces life-cycle costs.;SOLUTION: In the rental method for the oxygen enrichment equipment, rental information on the oxygen enrichment equipment 1 is inputted to a terminal, rental fees are calculated by a server in accordance with rental time information from the terminal, and the rental fees are obtained. Because a user pays the rental fees just for use conditions that the user has used the oxygen enrichment equipment 1, the life-cycle costs can be reduced considerably. Also, when the oxygen enrichment equipment is used in a transportation means such as a train or a plane, it can be rented for the rental fees equivalent to the time used. It is also possible to establish a rental system capable of clearly and promptly calculating the rental fees calculated from the use situation of the user.;COPYRIGHT: (C)2005,JPO&NCIPI
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