Definition of tankless in US English:

tankless

adjective

  • See tank

    • ‘And a tankless hot-water heater provides warm water on demand, rather than consuming energy 24 hours a day.’
    • ‘A system is available in which a tankless gas water heater is installed outdoors and piped inside to the old electric storage tank, which is disconnected from its power supply.’
    • ‘No separate storage tank is needed in the tankless coil water heater because water is heated directly inside the boiler in a hot water heating system.’
    • ‘With that information, we'll be able to say with much more certainty what the propane and water savings should be with the tankless arrangement, and therefore compare costs over the lifetime of the alternatives.’
    • ‘Armed with this information, we began our search for tankless hot water heaters that would meet all of these requirements.’