High affinity iron permease; part of the reductive iron assimilatory system (RIA), a siderophore-independent high affinity iron uptake mechanism (PubMed:23658520). Expression is repressed by iron starvation and up-regulated in the absence of the sidN siderophore synthetase (PubMed:23658520). Belongs to the oxidase-dependent Fe transporter (OFeT) (TC 9.A.10.1) family.