Contact HIU Engineers London
Ready to book a service or need advice? Fill in the form below and our team will get back to you promptly.
Get a Free Quote
Book a Same-Day Callout
Tell us your postcode and the issue — we'll call you back within 1 working hour with a transparent quote.
- 1-hour callback
- Free, no-obligation quote
- Specialist HIU engineers
Find Us
Collide Group
8 Halsbury Road East
Northolt, Greater London
UB5 4PU
Mon–Fri: 8am – 6pm
Saturday: 9am – 4pm
About HIU Service & HIU Repair in London
Collide Group is a specialist Heat Interface Unit (HIU) engineering company based at 8 Halsbury Road East, Northolt, serving all of Greater London. We are Gas Safe registered and WRAS certified, specialising in HIU service, HIU repair, HIU installation and HIU power flushing on Danfoss, SAV, Switch2, Caleffi and all major brands. A Heat Interface Unit (HIU) is the compact heat exchanger fitted in flats and apartments connected to a communal or district heating system.
Our manufacturer-trained engineers service, repair and install every major HIU brand used across the UK including Danfoss, SAV, Switch2, Caleffi, Alfa Laval, Heatweb, Thermal Integration and Redan.
Call 020 3951 5133 for a free quote — we respond within one working hour.