The heat label: how your district heating is generated
The way district heating is produced varies by area. The heat label shows which heat sources were used in your area in 2025 and what the environmental impacts were.
Heat label image
Heat label in text
Read per area which energy sources are used and what the environmental impacts are.
Energy sources
- Heat from waste incineration: 62.4%
- Biomass: 37.3%
- Gas-fired boilers (peak and backup/temporary): 0.3%
Environmental impacts
- Share of renewable energy¹: 70%
- Share of residual heat¹: 19%
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 83.6%
- CO₂ emissions: 9.6 kg/GJ
- Heat loss: 26%
- Primary energy factor (fPdel) according to NTA 8800: 0.13
- Renewable energy factor (fPren) according to NTA 8800: 0.89
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Heat from waste incineration: 4.0%
- Heat from power plants (gas): 82.2%
- Gas engines (CHP): 3.2%
- Gas-fired boilers (peak and backup/temporary): 9.3%
- E‑boiler (test run): 1.3%
Environmental impacts
- Share of renewable energy¹: 6%
- Share of residual heat¹: 14%
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 56.2%
- CO₂ emissions: 25.8 kg/GJ
- Heat loss: 22%
- Primary energy factor (fPdel) according to NTA 8800: 0.51
- Renewable energy factor (fPren) according to NTA 8800: 0.19
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Cold from surface water: 86.7%
- Electricity from the public grid: 13.3%
Environmental impacts
- Share of renewable energy¹: 87%
- Share of residual heat¹: –
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 57%
- CO₂ emissions: 8.0 kg/GJ
- Heat loss: –
- Primary energy factor (fPdel) according to NTA 8800: 0.15
- Renewable energy factor (fPren) according to NTA 8800: 0.87
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Heat from power plants (gas): 87.8%
- Biomass: 4.7%
- Gas-fired boilers (peak and backup/temporary): 5.9%
- Solar: 0.4%
- E‑boiler (test run): 1.2%
Environmental impacts
- Share of renewable energy¹: 9%
- Share of residual heat¹: 39%
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 61%
- CO₂ emissions: 22.5 kg/GJ
- Heat loss: 38%
- Primary energy factor (fPdel) according to NTA 8800: 0.44
- Renewable energy factor (fPren) according to NTA 8800: 0.49
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Heat from waste incineration: 93.6%
- Biomass: 3.3%
- Gas-fired boilers (peak and backup/temporary): 3.2%
Environmental impacts
- Share of renewable energy¹: 82%
- Share of residual heat¹: –
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 75%
- CO₂ emissions: 14.8 kg/GJ
- Heat loss: 34%
- Primary energy factor (fPdel) according to NTA 8800: 0.21
- Renewable energy factor (fPren) according to NTA 8800: 0.82
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Heat from waste incineration: 93.3%
- Gas-fired boilers (peak and backup/temporary): 6.7%
Environmental impacts
- Share of renewable energy¹: 64%
- Share of residual heat¹: 10%
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 64%
- CO₂ emissions: 20.9 kg/GJ
- Heat loss: 37%
- Primary energy factor (fPdel) according to NTA 8800: 0.31
- Renewable energy factor (fPren) according to NTA 8800: 0.74
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Heat from power plants (gas): 59.2%
- Gas-fired boilers (peak and backup/temporary): 40.8%
Environmental impacts
- Share of renewable energy¹: –
- Share of residual heat¹: 23%
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 29%
- CO₂ emissions: 42.0 kg/GJ
- Heat loss: 25%
- Primary energy factor (fPdel) according to NTA 8800: 0.83
- Renewable energy factor (fPren) according to NTA 8800: 0.23
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energy sources
- Heat from waste incineration: 74.7%
- Gas-fired boilers (peak and backup/temporary): 3.0%
- Industrial residual heat: 22.3%
Environmental impacts
- Share of renewable energy¹: 38%
- Share of residual heat¹: 21%
- CO₂ reduction compared to high-efficiency gas boilers / compression cooling: 24%
- CO₂ emissions: 44.7 kg/GJ
- Heat loss: 27%
- Primary energy factor (fPdel) according to NTA 8800: 0.58
- Renewable energy factor (fPren) according to NTA 8800: 0.60
¹ Calculation method in accordance with “Reporting Format for Sustainability Reporting for Suppliers under the Heat Act (Warmtewet)”
Energiebronnen
- Biomassa: 80,8%
- Gasgestookte ketels (piek en back-up/tijdelijk): 19,2%
Milieugevolgen
- Aandeel hernieuwbaar¹: 78%
- Aandeel restwarmte¹: –
- CO₂-reductie t.o.v. HR gasketel/compressiekoeling: 66%
- CO₂-uitstoot: 20,0 kg/GJ
- Warmteverlies: 41%
- Primaire energiefactor (fpdel) volgens NTA8800: 0,39
- Hernieuwbare energiefactor (fpren) volgens NTA8800: 0,78
¹ Berekeningswijze conform ‘Rapportageformat Duurzaamheidsrapportage voor leveranciers in het kader van de Warmtewet’
Energiebronnen
- Biomassa: 81,1%
- Gasgestookte ketels (piek en back-up/tijdelijk): 18,9%
Milieugevolgen
- Aandeel hernieuwbaar¹: 77%
- Aandeel restwarmte¹: –
- CO₂-reductie t.o.v. HR gasketel/compressiekoeling: 70%
- CO₂-uitstoot: 17,4 kg/GJ
- Warmteverlies: 30%
- Primaire energiefactor (fpdel) volgens NTA8800: 0,34
- Hernieuwbare energiefactor (fpren) volgens NTA8800: 0,77
¹ Berekeningswijze conform ‘Rapportageformat Duurzaamheidsrapportage voor leveranciers in het kader van de Warmtewet’
Frequently Asked Questions
Waste Incineration Plant
A waste incineration plant generates electricity and heat by burning waste. Part of that heat is renewable, because the waste contains paper, wood residues, and unused food.
Biomass (wood, biogas)
Biomass is the collective term for biodegradable products and residues from natural sources. Examples include products from agriculture and horticulture, waste wood from forests, residual materials from industrial production, and household organic waste. When burned, biomass is used to produce electricity and heat.
Solar
In Almere Noorderplassen, part of the heat is generated using solar collectors, as stated on our heat label. The sun heats water, which is then supplied to the district heating network.
Cold from Surface Water
In parts of Amsterdam Zuidoost and Amsterdam South, we provide cooling and cold through the district heating network. For this cooling, we use water from the Ouderkerkerplas and the Nieuwe Meer.
Gas-Fired Boilers (Peak/Temporary)
These “auxiliary boilers” are switched on when it is very cold and there is high demand for heat. They are also used as a backup during maintenance or disruptions in the primary heat supply. They ensure there is always enough heat available.
Gas Engines (CHP)
A small part of our district heating network in Amsterdam Zuidoost is (still) connected to a combined heat and power (CHP) plant that runs on natural gas.
Power Plants (Gas)
In a power plant, natural gas is burned to produce steam. This steam drives a turbine to generate electricity, and part of it is extracted to supply heat. This results in less electricity production, but energy is used more efficiently overall.
Industrial Residual Heat
This is waste heat released during industrial processes, for example in the Port of Rotterdam.
Electricity from the Public Grid
When more electricity is available than is needed at a given time, we use it to heat water in electric boilers (e‑boilers). The heat produced is then supplied to the district heating network.
Share of Renewable Energy¹)
This is the share of the energy sources used that does not result in additional CO₂ emissions.
Share of Residual Heat¹)
This is heat that is released as a by-product of another process.
CO₂ Reduction Compared to High-Efficiency Gas Boilers / Compression Cooling
This shows how much CO₂ emissions are reduced by using district heating or cooling instead of high-efficiency gas boilers or traditional cooling systems.
CO₂ Emissions (kg/GJ Supplied)
The amount of CO₂ emissions, in kilograms, per gigajoule of heat supplied.
Heat Loss
The amount of heat that is not counted as delivered heat during transport from the source to the end user.
Primary Energy Factor (fPdel) According to NTA 8800
This factor indicates how much fossil energy is required to produce, transport, and deliver the supplied heat. The lower the value, the better, because a low value means more use of sustainable energy sources.
Renewable Energy Factor (fPren) According to NTA 8800
This factor indicates how much of the supplied heat comes from renewable sources. A higher factor means a more sustainable heating network, as fewer fossil fuels are used for generation.
The figures on the heat label are calculated using a model that complies with the reporting requirements of the Dutch Heat Act (Warmtewet).
