M&M Compliance Training
It is now five years since the NHS published Delivering a Net Zero National Health Service, and the 2026 progress report makes the direction of travel clear. The NHS has committed to net zero by 2040 for the emissions it controls directly (the NHS Carbon Footprint), and net zero by 2045 for the wider emissions it can influence (the NHS Carbon Footprint Plus). Interim targets sit between them: an 80% reduction in directly controlled emissions by 2028–2032, and an 80% reduction in influenced emissions by 2036–2039.
Those are sustainability targets on paper. On site, they are engineering and compliance targets. Every decarbonisation intervention — replacing a fossil-fuel boiler with a heat pump, retrofitting ventilation for heat recovery, switching refrigerants, redesigning hot-water systems to run at lower temperatures — touches an HTM discipline and an Authorising Engineer or Authorised Person appointment. This article explains why net zero is a competence story for estates teams, not just a sustainability story, and where MMCTS sees the compliance pressure points heading into the 2028–2032 window.
Direct NHS emissions are down 68% since 1990 and 14% in the last five years — but the next 80% will be won inside HTM disciplines, not separate from them.
The 2026 progress report records meaningful but uneven progress. Direct emissions are down 68% on the 1990 baseline and down 14% over the last five years; the NHS reports that it is on track to its 2032 and 2040 goals. Anaesthetic gases and inhalers — which between them make up roughly 20% of NHS direct emissions — are down by around a third. Procurement, transport and the wider Carbon Footprint Plus remain the harder problem.
For estates teams, two facts in the report matter most. First, the trajectory between 2026 and 2032 will be dominated by heat decarbonisation: green plans should identify and prioritise phasing out fossil-fuel primary heating by 2032, with oil-fired heating to be removed by 2028. Second, capital is finally arriving at the scale needed: the NHS Decarbonisation of Estates framework, with bids closing 1 May 2026 and the four-year programme starting on 1 October 2026, is sized at around £1bn and covers everything from heat pumps and solar to ventilation and district-heating retrofits.
It is tempting to file net zero under “sustainability,” staff it from the green plan team, and treat compliance as a parallel workstream. That model breaks the moment you walk on site. The technologies driving NHS heat decarbonisation — heat pumps, low-temperature hot water, electrified plant, refrigerant changes, heat recovery on critical ventilation — all sit inside the very HTM and regulatory frameworks the estate is already obliged to operate under.
F-Gas: heat-pump refrigerants and chillers must be selected, installed and maintained under GB F-Gas rules.
HTM 03-01: ventilation efficiency, heat recovery and air-side improvements interact with specialised ventilation validation.
HTM 04-01: lower hot-water temperatures introduce additional Legionella risk that has to be managed in the water safety plan.
HTM 06-02: electrification raises LV electrical demand, redundancy and resilience questions.
HTM 00: appointment letters and competence frameworks need to keep pace.
A heat pump is a refrigeration system. Selecting it, installing it and maintaining it engages the GB F-Gas regime, including individual competence for engineers handling fluorinated gases and company certification for the installer. As lower-GWP refrigerants become the default, estates teams will need procurement and maintenance contracts that reflect the actual rules — not assumed ones — with the right enforcement body in scope (the Environment Agency in England, SEPA in Scotland).
Heat pumps deliver hot water at lower flow temperatures than steam or condensing boilers. That changes the risk profile under HTM 04-01: lower temperatures, combined with longer pipework runs and storage, can increase Legionella risk if the water safety plan, the Water Safety Group and the AP (Water) arrangements have not been updated to match. Decarbonising the heat source without rewriting the water safety plan is one of the easier ways to import risk in pursuit of carbon savings.
Theatres and other critical spaces governed by HTM 03-01 are obvious candidates for heat-recovery and demand-control improvements. Each change — new dampers, new controls, new run schedules — needs validation and independent verification before the space goes back into clinical use. Decarbonisation does not change the standard the room must meet; it changes how often the validation evidence needs to be regenerated.
Heat pumps, EV charging and the wider electrification of plant push more load onto the LV electrical infrastructure governed by HTM 06-02. Where Trusts add capacity, the appointment regime, the AP (Electrical) workload and the resilience case all need to be reviewed. The NHS Net Zero Building Standard sets technical expectations for new and major refurbishment schemes, but operational sites need parallel work.
The technology to decarbonise NHS heating largely exists. The constraint, repeatedly cited in trust green plans, is competent people: AEs and APs who understand both the new low-carbon technologies and the HTM regimes they sit inside, plus the design teams, contractors and verifiers who can deliver compliant retrofits at pace.
At-a-glance: net zero timeline for estates teams
2028
Oil primary heating removed from estate (per green plan guidance)
2028–2032
80% reduction in directly controlled emissions; fossil-fuel primary heating phased out
December 2026
Sustainable travel plans incorporated into green plans
1 October 2026
NHS Decarbonisation of Estates framework programme starts (~£1bn, four years)
2036–2039
80% reduction across the NHS Carbon Footprint Plus
2040 / 2045
Net zero for directly controlled / influenced emissions
We work with NHS Trusts on the competence layer the decarbonisation framework will rely on. We deliver F-Gas training and certification aligned to the GB regime, so the engineers maintaining heat pumps and chillers are credentialled correctly. We deliver AP training across HTM 03-01, 04-01 and 06-02, so ventilation, water and electrical decarbonisation interventions stay compliant. We support AE appointment and IHEEM-aligned competence evidence for the engineers signing off the new systems. And we help estates teams build competence management systems that connect the green plan to the appointment letter.
To identify safe opportunities to reduce ventilation energy use without compromising clinical safety or HTM 03-01 requirements, explore our Ventilation Energy Setback Assessments for NHS Estates.
Book a 30-minute net-zero competence review with our team. We will help you map the training and appointment requirements against your decarbonisation pipeline.
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