Mnh complex is a Na(+)/H(+) antiporter involved in Na(+) excretion. May form a heterooligomeric complex that consists of seven subunits: mnhA1, mnhB1, mnhC1, mnhD1, mnhE1, mnhF1 and mnhG1. Belongs to the CPA3 antiporters (TC 2.A.63) subunit E family.