We provide HIU installation and HIU replacement in London for communal and district heating systems. From supply-and-fit replacements to new installs, we handle removal, fitting, commissioning and performance checks for heating and hot water, with clear documentation provided.

If you want a quote quickly, send us a photo of the HIU label and a short description of what you need.

Call: 0800 195 6468
Email: [email protected]

What we do:

HIU replacement

We remove and replace existing Heat Interface Units, reconnect services, recommission the unit correctly, and verify performance for heating and hot water.

New HIU installation

We install HIUs for new layouts and refurbishments within communal heating schemes, subject to site survey and system specification. We confirm the correct unit type and compatibility before booking.

Commissioning and recommissioning

Every installation includes commissioning checks and performance testing to confirm stable temperatures, correct operation and reliable hot water delivery.

What’s included in HIU installation and replacement

• Pre-install checks and isolation of supplies

• Removal and disposal of the old HIU

• Supply and installation of the new HIU (as quoted)

• Connection of pipework, services and wiring (as applicable)

• Filter/strainer check and system inspection

• Commissioning and performance checks (heating and hot water)

• Controls verification and settings check

• Written commissioning and completion documentation (PDF)

Repair or replace

Repair is usually the best option when the fault is isolated and parts are available. Replacement may be recommended when the HIU has repeated failures, parts are obsolete, performance is poor due to internal wear, or when repair costs approach replacement value. We will advise the most cost-effective route once we confirm the model and site details.

HIU brands and compatibility

We install and replace common HIU models used in London apartment blocks and communal heating schemes. To confirm compatibility, please send a clear photo of the HIU label and any available specification details. We will confirm suitability and availability before attendance.

• Danfoss

• Evinox Modusat

• Intatec

• Altecnic

• Other leading HIU brands used in London blocks

Warranty and insurance

HIU replacement warranty is manufacturer-dependent and varies by brand and model, typically 2 to 5 years, with extended warranty options available on some models. We confirm the exact warranty in writing at quotation stage and provide documentation after completion. We also hold £5,000,000 public liability insurance.

Who we support

• Residents in communal heating flats

• Landlords and private owners

• Managing agents and facilities teams

• Housing associations

• Developers and contractors

What we need to provide a quote

• Property postcode and access details

• Photo of the HIU label (brand and model)

• Whether this is a replacement or a new install

• Any symptoms (no hot water, no heating, leaks, fault codes)

• Any site requirements (parking, access times, permits)

• Preferred appointment dates