RUR98-121514-body.jpgRinnai has introduced a new line of condensing tankless water heaters, featuring a recirculation technology to help users save time, money, and natural resources. Along with the recently introduced dual venting options on interior units (RUC98i andRUC80i ), the RUR98i and RUR98e, the newest additions to the Ultra Series condensing tankless water heater family, come equipped with an integrated pump, internal bypass line and thermal bypass valve, and will work with either a dedicated return line or a cross over valve. Unlike other tankless water heaters that offer recirculation, the Ultra Series RUR models do not require a dedicated return line or a complex and expensive building of system components by the contractor.