Heatre Sadia Supreme instant boiler water dispenser. The Supreme is a permanently plumbed, wall-mounted, electric water-boiling unit. The water boiling unit that drives the Heatre Sadia Supreme range uses IntelliboilTMPlus technology for energy efficient management of the boiling cycle alongside an integrated water conditioner to decrease scaling. The Supreme range delivers water direct from the hot water boiling unit itself by an integrated spout. Making it a popular all-in-one solution.