Umuyaga uhumeka ugomba gushyirwa mu muyoboro uzengurutse nyuma yo kuyungurura umwuka winjira, mbere yuko HRV yinjira.Yashizweho kugirango ikingire uburyo bwa defrosting, ni ukuvuga kwirinda gukora igitutu gito mu nzu.Ubushyuhe bugenzurwa na thermostat, guhinduranya munsi yubushyuhe bwo hanze gusa.