What types of HIU are available as part of the Baxi AquaHeat range?

The Baxi AquaHeat Heat Interface Unit (HIU) range is available in two main types;


  1. Baxi AquaHeat HI / HWI – meaning Heating Indirect and Hot Water Indirect. These units are suited for individual dwellings be that an apartment or house and are fit with two plate heat exchangers: one for space heating, the other for instantaneous DHW production. 
  2. Baxi AquaHeat HI – meaning Heating Indirect. These units are suited for communal spaces or Commercial Premises within a development and can provide high levels of space heating with no DHW production. 


With these two models, the Baxi AquaHeat range can meet the needs of most apartment building developments by supplying models suited for both the apartments themselves and the communal / commercial spaces within the development.

Take a look at Baxi's AquaHeat HIU 

For homes fed with heat from a heat network, the Baxi AquaHeat is the answer to your apartment’s heating and hot water requirements. Perfectly suited to supply heat to communal and commercial premises in your development.

Related FAQs

What outputs are the Baxi AquaHeat range available in?

Baxi AquaHeat HI/HWI is available in two different outputs, available with or without a Heat Meter and the Mercurius connected module factory fit. Read more

What primary (Heat Network) conditions are the AquaHeat HIUs suitable for operating at?

The AquaHeat range of HIUs can operate with primary temperatures from the Heat Network up to 90°C and maximum primary operating pressures of 16 bar.

What approvals and certification does the Baxi AquaHeat range hold?

Baxi AquaHeat range of Heat Interface Units (HIUs) are all compliant with UK Water Regulations & Bylaws, with the certification carried out by NSF. Read more

What is VWART?

VWART stands for Volume Weighted Average Return Temperature. Read more about it in our Baxi FAQ section...

In what lead time are the Baxi AquaHeat range products available?

Baxi AquaHeat range & associated accessories & controls are available on an 8-week lead time. Baxi can also manage a phased delivery depending on project.

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