Circulation heaters akaiswa mukati memudziyo wakavharidzirwa nemhepo umo mvura kana gasi inopfuura.Zviri mukati zvinodziiswa pazvinoyerera zvichipfuura nekudziya chinhu, zvichiita kuti maheater ekutenderera akwane pakudziya kwemvura, kudzivirira chando, kupisa kwemafuta ekupisa, nezvimwe.
Circulation heaters ane simba, magetsi ari mu-line heaters akagadzirwa nescrew plug kana flange-yakaiswa tubular hita gungano inoiswa mutangi rekusangana kana mudziyo.Zvinwiwa zvisina kudzvanywa kana zvakanyanya kudzvanywa zvinogona kudziyiswa zvinobudirira uchishandisa yakananga kutenderera kudziyisa.