Camplux On Demand Electric Tankless Water Heater 14kW | WhiteOn Demand Endless Hot Water The on demand tankless hot water heater unlike a traditional water heater, you don't have to wait more than 3 seconds to get plenty of hot water for your shower. Take a shower whenever you like at home and the most crucial thing is to save a lot of time Space saving Design The wall mounted design looks stylish and compact. Up to 91. 55% smaller than other electric water heaters. Dimensions 9. 76" x 13. 9" x 2. 56".