Li-heaters tsa Tubular ke tsonae feto-fetohang ka ho fetisisa ea lisebelisoa tsohle tsa ho futhumatsa motlakase.Li khona ho etsoa hore e be tlhophiso efe kapa efe.Lisebelisoa tsa ho futhumatsa li-tubular li etsa phetiso ea mocheso e ikhethang ka conduction, convection le radiation ho futhumatsa maro, moea, likhase le bokaholimo.