tankless
/ˈtæŋkləs/
adjective
- Not having a tank; especially describing a water heater that heats water on demand rather than storing it in a tank.
- A tankless system provides hot water continuously, but it can be expensive to install.
- The camper van had a tankless propane heater for quick showers.
- They installed a tankless water heater to save space in the utility closet.