What accessories do I need for my Heat Interface system?

The full list of compatible accessories is shown below: 

Product CodeDescription7867470 – Aquaheat
HI/HWI 4/50 w/ Heat
Meter & Mercurius
7867472 – Aquaheat
 HI/HWI 4/50 
7867476 – Aquaheat
HI/HWI 14/50 w/ Heat
 Meter & Mercurius

7867477 – Aquaheat 

HI/HWI 14/50

7867481MercuriusOPOP
7867480First Fix Rail inc. flushing bypass & filling loopPPPP
7867485First Fix Rail inc. flushing bypass & filling
loop for use with stand-off bracket
PPPP
7867482Stand-off framePPPP
7867483Secondary L-pipes for use with stand-off framePPPP
7867484Primary L-pipes for use with stand-off framePPPP

We would recommend the purchase of a First Fix Rail arrangement with an HIU to enable a more accurate, standarised and efficient installation. The First Fix Rail comes complete with ball valves for all primary and secondary connections, flushing bypass and a Baxi Easy-Fill filling link.

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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