Hindustan Sanitaryware & Industries Ltd. Offers Online Heater. Hindustan Sanitaryware & Industries Ltd. Is an ISO 9001, 14001 and OHSAS 18001 certified company. The Online Heater falls in the category of bath tubs and whirlpool accessories. This Online Heater is available in different colors. This Online Heater is safe to use and consists of an adjustable thermostat.