A Practical Roadmap

How local authorities can turn decarbonisation strategy into action.

Leisure centres are among the most energy-intensive assets in any public estate.

Swimming pools, air handling systems, humidity control, domestic hot water, extended operating hours and strict comfort requirements create a perfect storm of high, continuous demand. For local authorities balancing decarbonisation and net zero commitments with severe budget pressures, these buildings have quickly become one of the most urgent priorities in estate-wide decarbonisation.

The challenge is no longer whether leisure centres should decarbonise, but how to do it practically.

The good news is that successful decarbonisation does not begin with expensive technology. It starts with understanding performance, sequencing investment correctly and protecting service continuity throughout delivery.

That is where a leisure centre decarbonisation roadmap becomes essential.

Why leisure centre decarbonisation feels difficult

Many leisure centres still operate from ageing 1970s–80s building stock, where legacy boilers, inefficient air handling units, outdated BMS controls and ageing pool plant all contribute to excessive energy consumption.

Several challenges typically slow progress:

• Ageing gas-led heating infrastructure
• Complex ventilation and dehumidification loads
• Poor historical metering visibility
• Electrical capacity limitations
• DNO upgrade requirements
• Revenue risk from downtime
• Live operational environments

Unlike offices or civic buildings, leisure centres cannot simply “switch off” for upgrades. Closures directly affect revenue, memberships and community wellbeing.

This operational dependency means decarbonisation must be phased, carefully engineered and disruption-led.

What good looks like in a decarbonised leisure centre

A high-performing leisure centre combines electrified heating, intelligent controls and demand-led optimisation.

Typically, this includes:

• Air source heat pumps replacing or reducing boiler reliance
• Upgraded AHUs with heat recovery
• Smart BMS control strategies
• Sub-metering and live energy dashboards
• Solar PV to offset increased electrical demand
• Predictive maintenance linked to plant performance
• Reduced fossil fuel dependency

A strong example is The Weald Sports Centre, where an electrification-led strategy delivered:

• 93% reduction in gas usage
• 550,000 kWh annual energy reduction
• 127 tonnes CO₂ saved annually

This is what a mature leisure centre decarbonisation roadmap should aim towards.

The hidden energy problem inside leisure centres

Pool environments are often responsible for up to 65% of total site energy demand, making them the single greatest decarbonisation opportunity.

Common issues include:

• Over-conditioned pool halls
• Simultaneous heating and cooling
• Excessive overnight ventilation
• Poor humidity deadbands
• Inefficient pump settings
• Legacy boilers short cycling
• Plant operating to fixed schedules rather than occupancy

Before any major technology upgrades, estates teams should focus on removing waste already embedded in the building’s operation.

The practical 5-stage leisure centre decarbonisation roadmap

Stage 1 — Understand your baseline

No roadmap works without visibility.

Start with:

• Detailed energy audits
• Plant condition surveys
• Controls reviews
• Occupancy and usage profiling
• Meter validation
• Fabric loss assessments

A RAG-based prioritisation methodology helps identify where interventions deliver the greatest energy, carbon and financial return.

Stage 2 — Fix what you already have

The fastest carbon savings usually come from existing systems.

Priority actions:

• BMS optimisation
• Revised pool hall schedules
• Deadband adjustments
• Temperature resets
• Sensor recalibration
• Valve replacements
• Insulation and heat loss fixes
• Water leak detection
• Maintenance-led efficiency recovery

These measures often reduce 10–20% of energy demand before capital projects begin.

Stage 3 — Upgrade critical systems

Once waste is removed, capital upgrades become more accurate and financially defensible.

Typical leisure centre upgrades include:

• Boiler replacement with heat-pump led systems
• AHU replacement
• Heat recovery upgrades
• Variable speed drives
• Smart metering infrastructure
• Advanced BMS integration

At Larkfield Leisure Centre, this staged approach enabled critical replacement of boilers and AHUs while maintaining operational continuity.

Stage 4 — Electrification and renewables

Electrification should be treated as an infrastructure programme, not a product purchase.

This stage includes:

• Heat pump deployment
• Low temperature heating redesign
• Emitter optimisation
• Electrical distribution upgrades
• DNO engagement
• Solar PV feasibility
• Battery storage assessment
• Demand-side load modelling

Solar PV becomes particularly powerful here because it offsets the increased electrical load created by electrified heating.

Stage 5 — Optimisation and continuous improvement

Decarbonisation is never complete after installation.

Long-term performance depends on:

• Real-time monitoring
• Seasonal recommissioning
• BMS tuning
• Predictive maintenance
• Asset performance dashboards
• Carbon reporting
• Lifecycle optimisation

This is where long-term ROI is protected.

Delivering projects without disrupting live leisure environments

One of the biggest risks in leisure centre decarbonisation is service disruption.

Successful delivery depends on:

• Phased shutdown windows
• Temporary ventilation and heating solutions
• Seasonal scheduling
• Live stakeholder communication
• Contingency plant
• Customer-safe construction phasing

Larkfield Leisure Centre is a strong proof point here, where temporary ventilation and staged works protected operational continuity throughout the programme.

Funding the decarbonisation roadmap and building the business case

The strongest decarbonisation business cases are no longer built around single funding opportunities. They are built around performance, risk reduction and long-term financial control.

A well-structured roadmap combines:

• Direct energy cost reduction
• Carbon reduction
• Maintenance savings
• Reduced emergency repairs
• Asset life extension
• Improved operational resilience
• Avoided future capital shock

In the absence of large-scale grant funding, many organisations are now moving forward through phased, self-funded investment strategies.

This typically means:

• Starting with low-cost optimisation to release immediate savings
• Reinvesting those savings into targeted system upgrades
• Prioritising assets based on condition and energy impact
• Aligning capital planning with lifecycle replacement cycles
• Avoiding reactive, high-cost failures through planned intervention

This approach shifts decarbonisation from a funding-led exercise to a performance-led strategy.

It also creates a stronger, more defensible business case. Rather than relying on external funding windows, estates teams can demonstrate:

• Measurable savings from day one
• Clear return on investment over time
• Reduced exposure to energy price volatility
• Improved budget predictability
• Better long-term asset planning

External funding, when available, can still accelerate delivery. But the most successful programmes are those that do not depend on it to begin.

Common pitfalls to avoid

The most common failure points are:

• Starting with technology instead of data
• Ignoring electrical infrastructure
• Poor sequencing
• Underestimating live operational complexity
• Weak stakeholder communication
• Treating decarbonisation as one project

The best-performing estates treat this as a continuous roadmap, not a one-off scheme.

From roadmap to measurable delivery

A practical leisure centre decarbonisation roadmap aligns three outcomes:

• Lower operational cost
• Lower carbon emissions
• Improved long-term asset resilience

The roadmap itself is already proven.

The real opportunity now is delivery sequencing, funding alignment and operational optimisation at estate level.

For local authorities, the question is no longer if leisure centres should decarbonise. It is how quickly the roadmap can begin.

Not sure where to begin?

We’ll help you understand your current performance, prioritise the right actions and map out a practical route to decarbonisation.