DBMU — Dynamic Burner Management Unit
Save energy. Cut CO₂. Keep comfort. The DBMU dynamically extends boiler cooling periods to eliminate unnecessary cycling — delivering typical savings of 15% or more on burner run-time.
Three outcomes, one device
Save energy
Average ~15% reduction in burner run-time by eliminating dry/short cycling.
Cut CO₂
Saving 10,000 kWh of gas ≈ 2,500 kg CO₂ avoided. Real, measurable impact.
Keep comfort
Never alters thermostat top-point. Learned minimum flow temp protects occupants.
How it works
Smart start-up (learning phase)
The DBMU lets the burner run for 2 cycles to bring the building up to heat, measures the lowest flow temperatures, then sets a sensor minimum 5°C below the lowest measured value — a fail-safe comfort guarantor.
Dynamic extension (E-Factor)
After start-up, the DBMU extends each cooling period by 75%. If flow temperature holds steady, E-Factor steps up (80, 82, 84… up to 90). If a LOW TEMP event occurs, the burner fires immediately and E-Factor steps down — increasing and decreasing dynamically with load.
Built-in proof of savings
Every 50 cycles the unit runs an automatic A/B test — one cycle without the DBMU, one with — and stores the actual measured savings %. The last three results are retained for download and reporting.
Cycle comparison & monthly savings
Left: measured burner cycles over 4 hours — 90 min total burn without DBMU vs 62 min with DBMU (21% saved). Right: typical monthly savings, peaking 30%+ in summer with a ~17% annual average. (Tap the chart to view full size.)
Real-life case study
Field test — Italy
Date: 02.03.2026 · Outside temperature: 13°C · Firmware 2.17 · Economy Factor 75 (span 20–90%)
Received test data
| No | Efficiency factor | Cooling — DBMU Off | Burning — DBMU Off | Cooling — DBMU On | Burning — DBMU On |
|---|---|---|---|---|---|
| 1 | 75 | 311 | 752 | 507 | 813 |
| 2 | 75 | 459 | 1192 | 1114 | 852 |
| 3 | 75 | 547 | 838 | 1140 | 741 |
Calculated results
| No | % Burn — DBMU Off | % Burn — DBMU On | Reduced firings in 24 hrs | Saving % |
|---|---|---|---|---|
| 1 | 70.74 | 61.59 | 16 | −12.93% |
| 2 | 72.20 | 43.34 | 9 | −39.97% |
| 3 | 60.51 | 39.39 | 17 | −34.90% |
Across three A/B cycles the DBMU cut burner run-time by up to ~40%, with an average reduction of around 29% — measured live on-site, not modelled.
Savings by annual consumption
What could you save?
Indicative annual cost reductions across typical building sizes, at three savings scenarios. Based on a gas price of 7p / kWh.
| Annual consumption | 25,000 kWh | 75,000 kWh | 125,000 kWh | 500,000 kWh | 1,500,000 kWh |
|---|---|---|---|---|---|
| Annual cost | £1,750 | £5,250 | £8,750 | £35,000 | £105,000 |
| 10% saving | £175 | £525 | £875 | £3,500 | £10,500 |
| New cost (10%) | £1,575 | £4,725 | £7,875 | £31,500 | £94,500 |
| 17.5% saving | £306.25 | £918.75 | £1,531.25 | £6,125 | £18,375 |
| New cost (17.5%) | £1,443.75 | £4,331.25 | £7,218.75 | £28,875 | £86,625 |
| 25% saving | £437.50 | £1,312.50 | £2,187.50 | £8,750 | £26,250 |
| New cost (25%) | £1,312.50 | £3,937.50 | £6,562.50 | £26,250 | £78,750 |
Illustrative figures based on 7p/kWh gas. Actual savings depend on building, plant and usage.
Certified results
16%
Average savings at 10°C outside (BRE Certificate CFP 348)
10,000+
Units deployed across UK, Scandinavia, France & Germany
12–24
Months typical payback period
Recognised on the UK Energy Technology List and approved for Enhanced Capital Allowance (ECA) and the Local Authority Energy Finance Scheme (LAEF). Government-supervised testing in Norway certified the DBMU as totally safe for boilers and heating systems.
Best-fit applications
Sectors
- • Commercial and public-sector sites
- • Schools, offices, civic buildings
- • Leisure centres and estates
- • Sites with variable occupancy or intermittent heating demand
System types
- • Single- or multi-stage burners
- • Oversized boilers (highest % savings)
- • Buildings with improved fabric (insulation, double glazing)
- • Estates needing reportable, audit-ready savings
Frequently asked questions
Will it reduce heating comfort?+
No. The DBMU never alters the thermostat's upper set-point. At start-up it learns a minimum safe flow temperature; if the flow approaches this level the burner fires immediately to protect comfort.
Does it work with our BMS?+
Yes. It's installed between the thermostat and the burner on the production side and does not conflict with distribution-side/BMS controls.
How does it prove savings?+
Every 50 cycles it performs an automatic A/B test: one cycle with the DBMU disabled, then one with it enabled, compares burner run-times, and stores the last three results for reporting.
What happens in very cold weather or sudden load spikes?+
The controller dynamically reduces the E-Factor (cooling-period extension). If a LOW TEMP is detected, the burner fires instantly and the E-Factor steps down for subsequent cycles.
Is there independent verification?+
Yes. Government-supervised tests in Norway confirmed safety and ~15% savings on 930 kW boilers. BRE Certificate CFP 348 reported average 16% savings at 10°C outside. Recognised on the UK Energy Technology List and approved for Enhanced Capital Allowance (ECA).
Want to save even more?
Inject-a-Therm
Save Energy
Achieve up to a 22% reduction using heat transfer fluid alone — pairs perfectly with the DBMU.
Ready to start your assessment?
Speak with an accredited lead assessor for a fixed-fee quote. No hidden costs.