Umuyoboro mwinshi welded spiral fined tube ikoreshwa mubusanzwe munganda za peteroli kandi ahanini ushyirwa mubice bya convection yubushyuhe bwumuriro, ibyuka bishyushya imyanda, abashinzwe ubukungu, ibyuma bishyushya ikirere, hamwe noguhindura ubushyuhe birimo guhererekanya ubushyuhe mumazi ashyushye mumazi akonje binyuze muri a urukuta.