Cut gas consumption across
every building you operate
Whether you run a council estate, a hospital trust, a university campus or a large housing portfolio, HeatFlow turns your metering data into a measurable, attributable, defensible gas reduction programme - quantified in kWh, £ and tonnes of CO₂.
The strategy is simple. The data has to be relentless.
Gas reduction in large buildings doesn't fail because the engineering is hard - it fails because nobody can measure it consistently across the estate. HeatFlow fixes the measurement problem so the engineering can finally pay back.
Built for Estate-Scale Operators
Council estates, NHS trusts, MoD bases, university campuses, hotel chains and large housing portfolios - HeatFlow scales from one plant room to thousands of meters across hundreds of sites.
Measure Reductions That Hold Up
Every percentage point of gas reduction is backed by metered data, BEIS-aligned carbon factors and a defensible baseline. No more 'we think we saved 12%' on a board slide.
Pinpoint the Worst-Performing Buildings
Normalised kWh/m² and kWh/dwelling benchmarks across your estate let you focus capex on the 20% of buildings causing 80% of the gas bill. UK heat networks typically run 4,000-8,000 kWh per dwelling per year; anything above 6,000 almost always has gains available.
Attribute Savings to Specific Interventions
Mark exactly when a control retrofit, boiler swap, pipe insulation, smart TRV rollout or behavioural campaign happened. HeatFlow shows you the precise before/after impact for each measure, on each building.
Surface Quick Wins Continuously
Anti-cycling tuning, weather compensation, DHW setpoint optimisation, leak detection - most large buildings have 5–15% gas savings hidden in operational tuning alone.
Board & Regulator Reporting
One platform produces the right report for each audience: granular operational data for engineers, headline carbon and £ saved for the board, BEIS-format evidence for regulators.
Where the money is being lost
Before any capital programme, it is worth knowing how much of your current gas bill buys nothing at all. In most estates the answer is a fifth of it.
You're paying for heat that reaches nobody
In a typical heat network, 15-25% of the heat produced never reaches a dwelling. It is lost through uninsulated pipework, faulty valves and bypassing HIUs. At 10p/kWh, a 100-unit scheme losing 20% wastes over £10,000 a year warming corridors and risers instead of homes.
Your boilers are working harder than they need to
Flow temperatures set 10°C too high, cycling losses from poor sequencing and oversized boilers running at low load all waste gas. These are operational issues - fixable without capital expenditure - that typically account for 8-15% of total gas input.
Nobody notices until the bill arrives
Without real-time monitoring, consumption anomalies go undetected for weeks. A 100-unit network with 20% avoidable losses wastes 8,000-10,000 kWh a month - roughly £800-£1,500 every month, out of sight, until the invoice lands. HeatFlow flags anomalies within hours.
What the market is doing to your budget in 2026
Two separate shocks are often blurred together. They are not the same event, and it matters for forecasting.
2020–2023: prices roughly tripled
Post-pandemic demand, constrained supply and the European gas crisis moved commercial gas from around 3p/kWh to the 8-12p/kWh band that estate budgets are still built on today. Prices never returned to pre-2020 levels.
February 2026 onwards: a further ~75%
The US-Israel war on Iran and Iran's closure of the Strait of Hormuz - through which around a fifth of global LNG normally transits - pushed UK wholesale gas up roughly 75% between late February and late March 2026. Ofgem raised the domestic price cap 4% from 1 October 2026.
What that means for a 100-unit network consuming 500,000 kWh of gas a year:
£15,000/yr
At 2020 prices (3p/kWh)
£50,000/yr
At 2026 prices (10p/kWh)
£37,500/yr
With a 25% efficiency gain
A 25% reduction is worth £12,500 a year at current prices - and that figure grows with every price movement. Commercial and communal heating users carry full market exposure, with no cap to sit behind, so consumption is the only variable you actually control.
A typical 12-month gas-reduction journey
Months 0–1 · Baseline & visibility
Historical gas data is loaded, smart meters are commissioned where missing, and HeatFlow establishes a normalised baseline per building. The estate league table appears for the first time - usually with a few uncomfortable surprises.
Months 1–3 · Quick wins
Fault elimination, anti-cycling tuning, weather compensation, DHW setpoint optimisation and leak fixing typically deliver the first 5–10% gas reduction with no capex.
Months 3–9 · Targeted retrofit
The worst-performing buildings get prioritised for controls retrofits, balancing, insulation or boiler optimisation. HeatFlow measures each intervention's contribution individually. At 10p/kWh, measures that needed five years to pay back at 3p/kWh now pay back in around 18 months.
Months 9–12 · Verified savings & next-phase business case
By month 12, most estates report 10–22% verified gas reduction, full BEIS-aligned carbon savings, and a fully-evidenced business case for the next funding round (PSDS, SHDF, internal capex).
Frequently Asked Questions
How can large buildings reduce gas consumption without major capex?
Most large gas-fired buildings have 5–15% reductions available through operational tuning alone: anti-cycling, weather compensation, DHW setpoint optimisation, balancing, schedule alignment with occupancy and leak elimination. HeatFlow surfaces these continuously and quantifies each opportunity in kWh and £.
What gas reduction is typical after a HeatFlow rollout?
Across communal heat networks and large buildings we typically see a 10–22% reduction in gas consumption within the first 12 months - combining operational optimisation, fault elimination, measurement accuracy and behavioural change. Capex retrofits then unlock further structural reductions.
How do I know if a building is using too much gas?
Benchmark it. UK heat networks typically consume 4,000-8,000 kWh per dwelling per year. Above 6,000 kWh per dwelling there are almost certainly efficiency gains available, and HeatFlow benchmarks every building in your estate against portfolio averages and against weather-normalised expectation.
Is gas efficiency still worth investing in at 2026 prices?
More so than ever. At 10p/kWh, measures that would have taken five years to pay back at 3p/kWh now pay back in around 18 months. The higher the gas price, the more each avoided kWh is worth - and 2026 prices are structurally above the pre-2020 level.
How do you measure savings without disrupting operations?
HeatFlow uses your existing or newly-installed smart meters and temperature sensors. Installation is non-intrusive (wireless wM-Bus / LoRa / NB-IoT) and the platform begins establishing a baseline immediately, with savings reporting available the day your intervention goes live.
Will this work alongside our existing BMS?
Yes. HeatFlow does not replace your BMS - it sits above it as the metering, M&V and reporting layer your BMS was never designed to provide.
Is this suitable for the Public Sector Decarbonisation Scheme (PSDS) or SHDF?
Yes. HeatFlow is purpose-built for PSDS and SHDF measurement & verification reporting, providing baselines, post-intervention tracking and BEIS-aligned carbon savings evidence in formats funding bodies expect.
Can energy-saving device manufacturers white-label HeatFlow?
Yes. If you make controls retrofits, smart TRVs, boiler optimisation kit, heat-pump controls or any other device that reduces gas consumption, HeatFlow provides the customer-facing measurement and reporting frontend you may not have built yourselves.