How long does it take to install a heat interface unit (HIU)?
It’s a question we get asked a lot, and the answer depends on several factors, including access and collaboration with other teams, but here’s a rough guide:
New build (pre-plumbed, first fix complete): 2 to 4 hours per unit
(If the pipework and risers are already in place, the HIU can be mounted, connected, tested and commissioned relatively quickly)
Retrofit in existing buildings: 4 to 8+ hours per unit
(Older properties may need extra time for adapting pipework, managing access or replacing legacy systems)
Complex installs (e.g. with metering, BMS integration or multiple zones):
Up to one full day per unit
(This includes flushing, commissioning and any additional controls setup)
Want to know more about HIUs or heat networks? We’ve compiled some FAQs on our EDGE HIU page.
