ʻO ka Hermetic High Temperature Heating Circulator ua hoʻolako ʻia me kahi pahu hoʻonui, a ʻo ka pahu hoʻonui a me ka ʻōnaehana circulation he adiabatic. ʻAʻole komo ka mea wela i loko o ka moku i ka holo ʻana o ka ʻōnaehana, akā pili ʻia me ka mechanically. ʻAʻohe mea kiʻekiʻe a haʻahaʻa paha ka mea wela o ka ʻōnaehana kaʻahele, ʻoi aku ka haʻahaʻa o ka waena o ka pahu hoʻonui ma mua o 60 °.
He ʻōnaehana hermetic ka ʻōnaehana holoʻokoʻa. Me ka wela kiʻekiʻe, ʻaʻole ia e hana i ka noe aila; me ka haʻahaʻa haʻahaʻa, ʻaʻole ia e komo i ka makū i ka lewa. Ma ka hana wela kiʻekiʻe, ʻaʻole e piʻi ke kaomi o ka ʻōnaehana, a ma ka hana haʻahaʻa haʻahaʻa, e hoʻohui ʻia ka ʻōnaehana wela me ka maʻalahi.