HIU Engineer


Company:	Vector Recruitment Solutions
Salary:	£42,000 to £46,000 a year
Hours:	Full-time
Location:	Greater London, KT1 3AW
Job type:	Permanent
Posting date:	2 Oct 2026
Closing date:	31 Oct 2026

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Summary

HIU & Plantroom Engineer

Salary: £42,000 – £46,000 per annum + company van (personal use permitted), fuel card, overtime, and on-call allowance

Location: London and the South (Mobile across client sites)

Applicants must have the existing right to work in the UK; sponsorship is not provided.

Are you a proactive, technically driven HIU & Plantroom Engineer looking to advance your specialist engineering capabilities within a market-leading building services environment?

A Leading Specialist is expanding its operations and seeking a highly skilled HIU & Plantroom Engineer to cover London and the South. This is a pivotal role offering the chance to take full technical ownership of communal heat networks across residential, student accommodation, and commercial portfolios, optimising network efficiency and plantroom lifecycle performance.

The Opportunity:

You will play a vital role in ensuring communal heat networks and central plantrooms operate at peak efficiency and regulatory compliance. Your day-to-day remit involves:

- Servicing, maintaining, fault-finding, and repairing heat interface units (HIUs) across key manufacturers (including Danfoss, SAV, and Evinox), covering plate heat exchangers, actuators, control valves, and heat meters.

- Commissioning and setting up new and replacement HIU installations, including system flushing, hydraulic balancing, and return-temperature optimisation.

- Executing planned and reactive maintenance across commercial plantrooms, servicing pumps, pressurisation units, buffer vessels, expansion vessels, and associated control systems.

- Diagnosing network distribution issues—such as bypass faults, high return temperatures, and low flow rates—while logging accurate digital compliance records and service sheets via mobile job management software.

The Package:

- £42,000 – £46,000 basic salary, fully expensed company van with personal use allowance, fuel card, specialist tooling, PPE, and on-call/overtime enhancements.

- Company workplace pension scheme, standard holiday entitlement, and comprehensive employee support.

- Funded training programmes (including G3 Unvented Hot Water and manufacturer-accredited HIU courses) with clear internal career progression pathways.

Technical Essentials:

To be successful, you must demonstrate high-level technical proficiency:

- Mandatory: NVQ Level 2/3 in Plumbing & Heating (or equivalent recognized trade qualification); G3 Unvented Hot Water certificate held or committed to completing funded certification.

- Compliance/Systems: Strong working knowledge of CP1 (Heat Networks Code of Practice), Heat Trust standards, and G3 compliance frameworks; proficient with mobile CAFM/reporting applications. (WRAS, Legionella awareness, or TMV servicing certifications advantageous).

- Experience: Proven field track record in commercial plantroom servicing, hydraulic wet heating systems, heating controls, and direct HIU diagnostic/repair work.

- Mobility: Full UK Driving Licence with flexibility for mobile regional coverage across London and the South and inclusion on an out-of-hours on-call rota.

For more information apply today. Take the next step in your Building Services career with a market leader that prioritises clear communication, technical excellence, and the continuous development of its people.

Apply for this job