Ishubhu yokufudumeza kahhavini yenziwe ngekhwalithi ephezulu ye-MgO eguquliwe njengesigcwalisi nensimbi engagqwali njengegobolondo. Ngemva kokunciphisa ithubhu, ingena kuhhavini ukuze ikhiphe umswakama. Ingakwazi ukugoba noma yikuphi ukuma ngokuvumelana nezidingo zomsebenzisi. Isetshenziswa kakhulu kwamanye amahhavini nakwezinye izinto zasendlini.
Ngaphambi kophenyo, sicela usithumele imininingwane engezansi:
1. Usithumelela umdwebo noma isithombe sangempela;
2. Usayizi we-heater, amandla kanye ne-voltage;
3. Noma yiziphi izidingo ezikhethekile ze-heater.