Electrically heatable carbon nanotube point-of-use filters for effective separation and in-situ inactivation of Legionella pneumophila

•Carbon nanotube sheet/polymer composites were designed as point-of-use (POU) filters.•The POU filters completely removed Legionella pneumophila.•The POU filters were electrically heatable over 80 °C using direct current power at 20 V.•The POU filters inactivated Legionella at 100% efficiency within 60 s.•The POU filters could be used as a final barrier of pathogens in water and air.