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Aipedia: Building services engineers
CIBSE has published no AI guidance, but its Code duties on competence, confidentiality and PI apply to AI work, and the February 2026 Statement of Ethical Principles names AI expressly. MEP engineers need to read these together because no single document covers AI.
Part of: AI in building services engineering
In short
CIBSE has no AI-specific guidance, and its Code of Professional Conduct (in force 1 January 2025, reviewed every two years) does not mention AI. Clause 4.2 (competence), 3.6 (privacy and confidentiality), 3.8 (PI and telling clients about cover) and 1.3 (no misleading statements) still govern AI-assisted work. The Engineering Council and Royal Academy of Engineering Statement of Ethical Principles (February 2026) asks engineers to consider fully the risks of technologies such as AI. IStructE guidance (February 2026) says firms should share AI policies with MEP engineers. There is no statutory regulator.
Building services engineering has no statutory regulator. Professional registration as CEng, IEng or EngTech runs through the Engineering Council, and CIBSE is the professional institution most MEP engineers belong to. Statutory duties come from the Building Regulations 2010 Part 2A dutyholder regime in England, the higher-risk building regime under the Building Safety Act 2022 and CDM 2015 regulation 9 for designers.
So the question "what does my regulator say about AI?" has a two-part answer: what your institution and the Engineering Council expect of you ethically and professionally, and what statute requires of the design whatever tool produced it.
As at October 2026, CIBSE has published no AI-specific guidance or code provision. The CIBSE Code of Professional Conduct (revision in force 1 January 2025) does not mention AI or technology, and it is reviewed every two years, so AI may be considered at the next review. The CIBSE digital engineering portal lists the DE series, including DE6.1 Cyber security in building services design (2019), with no AI item.
The absence of AI wording does not leave a gap. The Code is written in terms of outcomes, and several clauses map closely onto the way MEP engineers now use AI.
| Clause | What it requires | What it means for AI in MEP practice |
|---|---|---|
| 4.2 | Only undertake work you are competent for, or under competent supervision. | An engineer must be able to check an AI-generated load calculation, energy model or fire system layout without the tool. Juniors using AI need supervision by someone who can. |
| 3.6 | Respect privacy and personal data; no disclosure of confidential information without legitimate cause or authority. | Client drawings, BMS exports and occupancy data should not go into AI tools whose data handling has not been checked and authorised. |
| 3.8 | Assess liabilities, hold PI insurance if appropriate and tell clients whether cover is held and if it lapses. | Firms should understand how their policy treats AI-assisted work and be accurate when telling clients about cover. |
| 1.3 | No statements known to be untrue or misleading. | AI-drafted compliance reports, savings forecasts and specifications must be checked before they go out under your name. |
The Statement of Ethical Principles, published by the Engineering Council and the Royal Academy of Engineering in February 2026, is linked from the CIBSE Code page. It is a statement of ethical principles rather than a rulebook, but registrants are expected to have regard to it. Four principles bear directly on AI:
For MEP engineers, Principle 5 is most relevant to autonomous or semi-autonomous building controls, AI fault detection and AI-optimised BMS, where the engineer may be designing or advising on systems that act without a person in the loop.
The IStructE AI guidance (5 February 2026) is aimed at structural engineers, but it expressly says firms should share their AI policy with MEP engineers and other stakeholders. On mixed design teams, expect structural colleagues to ask how you use AI and to tell you how they do.
CROSS-UK Report 1554 (16 July 2026) describes AI-written calculations used to justify heavy plant on an existing roof. The CROSS expert panel stressed that AI output can look "highly plausible and authoritative" while being wrong, and that professionals must work within their competence. See our guide to rooftop plant and AI calculations.
| Document | Publisher and date | Status | AI content |
|---|---|---|---|
| Code of Professional Conduct | CIBSE, in force 1 January 2025 | Binding on CIBSE members | None; general duties apply |
| Statement of Ethical Principles | Engineering Council and Royal Academy of Engineering, February 2026 | Ethical statement for registrants | Names AI expressly (Principle 5) |
| DE6.1 Cyber security in building services design | CIBSE, 2019 | Technical guidance | None; relevant to connected systems |
| AI guidance | IStructE, 5 February 2026 | Guidance for structural engineers | Share AI policy with MEP engineers |
| Building Regulations Part 2A | Statute, from 1 October 2023 | Binding law | None; competence and designer duties apply |
In practice, a defensible position looks like this: a written AI policy, a named competent person who checks every AI-assisted output that leaves the firm, controls on what client data goes into which tools, and records showing what was checked and how. That record supports your Part 2A duties under regulations 11F, 11J and 11K and shows Code clause 4.2 compliance if a design is challenged.
On insurance, neither CIBSE nor the Engineering Council has said anything about AI and PI. PI is not compulsory by statute, but Code clause 3.8 requires cover where appropriate and appointments normally require it. PI wordings may respond to negligent professional services without distinguishing the tools used, subject to exclusions such as cyber and data, fire safety restrictions and fitness for purpose. See whether MEP engineers' PI covers AI errors, AI and client data, our building services consultants insurance page and the AI in building services hub.
Apex arranges PI for building services engineers and consultancies. A broker can review your cover against your appointments and how your policy treats AI-assisted design and advice.
No. The revision in force from 1 January 2025 does not mention AI or technology. Its competence, confidentiality, honesty and PI clauses still apply to work produced with AI, and the Code is reviewed every two years.
It is a statement of ethical principles from the Engineering Council and the Royal Academy of Engineering rather than a detailed rulebook. Registered engineers are expected to work to it, and the CIBSE Code page links to it.
It says firms should share their AI policy with MEP engineers and other stakeholders. On mixed teams, structural and building services engineers should know how each other uses AI, especially where plant loads or openings affect the structure.
No CIBSE disciplinary outcome, UK court judgment or regulator warning specific to AI misuse by building services engineers had been verified as at October 2026. CROSS-UK Report 1554 is the nearest verified UK incident.
Tell us about your firm and the work you do. A broker will review how your current PI treats AI-assisted work, or arrange new cover. No fee for a quote. Or call 0117 325 0027.
Start a PI quote Request a callbackApex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Registered in England and Wales, company number 07014570. This page is general information about how AI is used in the profession and how insurance may respond. It is not legal, regulatory or insurance advice on your circumstances, and it does not guarantee that cover will be available or on what terms.
