Do steam heating systems require more or less water than hot water systems?

Question

Do steam heating systems require more or less water than hot water systems?

Answer 1

I think heating systems require more water than a hot water systems because of the consumption of the water , during the process!

Answer 2

Steam heating systems require less water than hot water systems. Once converted into high pressure steam, the steam can be recycled and used for a few times before exhausting (and using new water source). The hot water system requires continuous water supply as the name itself suggests.