Geothermal Vierpolders

On this page, you can read more about the Vierpolders Geothermal Project.

What are we going to do?

In 2008, a group of 8 horticultural entrepreneurs took the initiative to develop a geothermal power plant in Vierpolders: Aardwarmte Vierpolders (A4P). As of 2016, A4P supplies sustainable heat to greenhouse horticulture companies. From 2017, it will also provide electricity through its own Combined Heat and Power (CHP) system.

The collective of horticultural entrepreneurs produces peppers, tomatoes, various propagating vegetables and potatoes and flowers with its more than 600 employees. These are supplied to hundreds of thousands of consumers in the Netherlands and Europe. Renewable energy is an important part of the production process. Where many horticultural companies still burn natural gas, A4P is committed to a sustainable heat supply. With the collective geothermal power plant, it increases energy efficiency and energy independence and reduces CO₂ emissions by about 50% annually. And that will increase in the future, is the ambition of A4P and Glastuinbouw Nederland. Geothermal heat also has an important role to play in the municipal of Voorne aan Zee and in national heat plans.

Initiators Geothermal Heat Vierpolders

Globe Plant BV, Islandplant BV, Kwekerij Nederpelt BV, Kwekerij Noordermeer Prominent, Tabos Eco BV, Vitensa, Van Der Voort, Timar BV

When does what happen?

Keep an eye on the A4P website at for updates on the schedule. You can also find a timeline here: .

Background Information: How Does Geothermal Energy Work?

Geothermal energy, or geothermal energy, is sustainable heat from underground that can be used to heat buildings and homes. The deeper we go into the earth, the warmer it gets. Every hundred meters down, the temperature rises by about three degrees, and so does the water at great depths. The water at A4P is about 80°C. Geothermal heat extraction involves pumping hot formation water from underground.

  • The pumped water remains in a closed circuit, through heat exchangers the heat is transferred to tap water. That tap water is transported through the heat grid. 
  • Once the heat from the formation water is transferred through a heat exchanger, the formation water is directly returned to the subsurface.
  • Through a distribution station, the heated tap water is transported to buildings and the cooled tap water is returned to the geothermal plant.
  • A building is connected to the heat grid through a receiving station (heat unit) inside the building.

Learn more about geothermal energy.

Contact us

Do you have any questions? 

Please feel free to contact Aardwarmte Vierpolders at: nl 

If you have any questions for the municipality regarding the geothermal project in Vierpolders, please call the general number: 14 0181