ᐅ Base cabinet with drawer

Does anyone know how much space is behind the 37cm (15 inches) deep drawers in a 60cm (24 inches) wide sink cabinet? Is that enough room for a tankless water heater?

Hello, of course it depends on the tankless water heater and whether it is to be mounted on the wall or on the cabinet itself.

Assuming a cabinet depth from the wall of 60cm (24 inches), subtracting the 34cm (13 inches) drawer leaves 26cm (10 inches) of space.