Science & measurements
The measurements speak for themselves.
The technology has been scientifically examined since 2011 and measured in real operation since 2016. Here are the institutes, the methods and the numbers — including measured values. Original documents available in full on request.
Three institutions, three methods, one result
Recording coming soon
Three routes of proof, one result
Two independent institutes predicted and simulated the effect. Since 2016, measurements on several hundred running plants have confirmed it — in documented projects with 11 to over 19 percent efficiency gain, and in every documented case above the forecast.
Gaswärme-Institut Essen (CFD simulation)
Numerical flow simulation with FLUENT (finite-volume method, SST turbulence model, discrete-ordinates radiation) on a 1,400 kW boiler: the ceramic stores act as a flow obstacle that forces the hot gases into a recirculation zone closer to the flame-tube wall. Result: around 18 percent more heat transfer to the water side and a flue-gas temperature 62 K lower.
Crucial for safety: even in the worst case the heat-flux density stays at 0.194 W/mm² — safely below the standard limit of 0.24 W/mm² (EN 12953-3). Maximum wall temperature is 360 °C, where 450 °C would be permitted. So the installation does not stress the flame tube. This benefit works regardless of the burner mode — cycling or modulating.
TU Clausthal — expert report
The thermodynamic report of the Institute of Energy Process Engineering and Fuel Technology shows: on boilers using the lower heating value, the ceramic delivers energy savings in the region of 20 percent “almost without exception” — around 10 percent on condensing boilers. Application range: from about 20 kilowatts to 50 megawatts.
The mechanism described in the report: the glowing ceramic works as a heat store across burner pauses. On plants whose flue path stays open during pauses, it additionally heats the air drawn in by the chimney — hot air has a much higher flow resistance, so only about a third of the air volume is drawn through the boiler. Remarkably, a ceramic mass of only about one percent of the water stored in the boiler is enough for this.
Long-term measurement at a large corporation (2019–2021)
Over 500,000 data records comparing two identical boilers — one with, one without ceramic: 12.1 percent higher efficiency against a 10 percent forecast, constant over two years. Payback: 1.3 years — at the low gas price of 3.87 ct/kWh at the time. At today's price level the payback shortens accordingly.
Field measurement protocol (2022, anonymised)
Warm-water boiler Viessmann Vitoplex 300 (450–2,550 kW): forecast 8 percent, measured 11.78 percent efficiency gain (safety corridor at ±5 percent measurement tolerance: 11.19 to 12.37 percent). Savings €35,703 per year, payback 0.65 years. Gas consumption per delivered kilowatt-hour fell by 10.5 percent — and CO₂ by the same amount, since it is linear to fuel. Combustion emissions: CO −25.3, NOx −23.1 percent.
The latest measurements (2026, anonymised)
Hospital, July 2026 — two warm-water boilers built in 1991 (3,150 kW each): forecast 12 percent, measured 15.22 percent efficiency gain, equal to a real 13.21 percent reduction in gas and CO₂ (safety corridor: 12.55 to 13.87 percent). Savings €118,890 per year, payback 0.54 years. Emissions: CO −23.68, NOx −16.53 percent. Remarkable: burner runtime in the measurement cycle fell from 205 to 105 minutes for the same heat delivered — the heat-store effect, visible directly in the protocol.
Automotive branch, April 2026 — warm-water boiler with state-of-the-art condensing technology (around 99 percent efficiency before installation): forecast 10 percent, measured 19.69 percent more energy yield per cubic metre of gas (safety corridor: 18.71 to 20.68 percent). Payback 1.23 years. That equals 16.45 percent less gas per delivered kilowatt-hour — and the same reduction in CO₂. Combustion emissions: CO −15.53, NOx −8.46 percent — on a boiler where nothing more seemed possible.
How reliable are these numbers?
These results are verifiable physics. The simulation uses the same models boiler makers use to design their plants (finite-volume method, FLUENT); the real-world saving is measured with a method developed together with TÜV. The expert report also shows why the effect is so large: the high-temperature store glows at around 1,000 °C while the boiler water varies by only a few degrees — which is why one percent of its mass suffices to move a comparable heat content during burner pauses.
The measurement method
Every project is measured before and after installation using a method developed together with TÜV: two measurement runs with identical instruments, in normal operation, designed for flow temperatures up to 110 °C. The difference (the “delta”) is measured, so instrument inaccuracies barely matter. The performance guarantee is based on this measurement: should the binding forecast ever not be met, you choose between renegotiating the terms and complete removal with a refund of the purchase price within seven working days. In 100 percent of documented projects the forecast was exceeded.
For context: the reports and measurements cited here were carried out on the HTC technology over the years — partly on test rigs, partly during live operation of real plants, partly together with TÜV, partly with the client companies' own engineers. We are happy to name the original document behind every statement.
The documents
You don't have to rely on summaries: the technical summary and five anonymised technical reports with measurement documentation are available here to read — in your language and as the German original.
On request, we will send you further expert reports. Full measurement protocols of individual reference projects are provided in a technical discussion — on request directly with our engineer, without sales.