Next Level Heat Interface Unit
Futureproof your project with our range of Heat Interface Units. From property to plant room, with our innovative products and our dedicated project teams, we’ve got you covered.
Why choose a Bosch HIU?
Project support
Our experts will be therefrom planning and design to installation and aftersales
BESA certified
BESA registered products and designed for the most energy efficient heat networks
Bosch engineering excellence
Innovative technology and reliability from the Bosch brand
What is a HIU?
Having a HIU is like having a combi boiler. It’ll provide instant heating and hot water, but instead of generating the heat itself, it takes heat from a shared central plant elsewhere.
Find out more
Flow 8000 Direct HIU
- Low temp. Integration – Maximum performance, minimum temperature loss
- Zero approach temp. – For more efficient low temperature heating systems
Flow 8500 Indirect HIU
- BESA 2023 registered and designed for the most energy efficient heat networks
- Our new precision temperature sensors ensure high performance, accurate control and overall network efficiency
Greenstar Indirect HIU
- Domestic hot water and space heating for properties that use district heating or centralised boiler plants
- Domestic hot water and central heating on demand with hydraulic system separation and two heat exchangers
The difference between Direct & Indirect HIUs
Direct HIUs are more streamlined with no pump or expansion vessel. The one plate heat exchanger provides instant domestic hot water (DHW) at a regulated temperature. This makes them potentially more efficient when conditions allow.
Why use Direct HIUs?
Indirect HIUs are the most popular option in the UK, offering greater safety and reliability. With two plate heat exchangers, an Indirect HIU can provide instant DHW at a regulated temperature and space heating (CH) within a property. Unlike a Direct HIU, an Indirect HIU has both a pump and an expansion vessel.