Hydrobox and all-in-one tower: two basic heat pump indoor units

In air-to-water heat pumps, the indoor unit can be a hydrobox or an all-in-one tower.

Hydrobox

It primarily includes the hydraulic and electronic components and works with a separate DHW tank.

All-in-one tower

It combines a hydrobox and an integrated domestic hot water tank in one vertical unit.

Selection

The all-in-one saves space, while the hydrobox offers greater flexibility in the selection and placement of the DHW tank.