De Zwoer

Driebergen-Rijsenburg, Netherlands

SSports centre: swimming pool | 750 sqm installation


Project summary Technical description Financing Development Downloads

Project Summary

Swimming pool De Zwoer realised a 750 m solar thermal energy system with covered single glazed collectors for pool as well as shower heating. The system has been built in 1990 and has been functioning well since that date. The solar system heats the fresh cold make-up water that is supplied to the pool continuously during the day. That enables a small solar heat storage volume for the system of 2.7 m. The swimming pool management has always been keen on opportunities for energy saving and renewable energy. In addition to the solar system the pool uses a combined heat and power unit (CHP) and heat-recovery from pool waste water.



Type of building

Sports centre: swimming pool

Number of users / dwellings, floors

not available

Year of construction


Total effective area (heated)

not available

Hot tap water consumption (measured/estimated)

44,000 m3/a
(measured: hot tap water and pool make-up water consumption)

Whole energy consumption for heating purpose after CSTS implementation

1,128,000 kWh/a
(measured: for shower water and pool make-up water)

System engineering

Year of construction of CSTS


Type of collectors

Flat plate collectors

Thermal power

525 kWtherm.

Aperture area of collectors*)

750 m2

Buffer storage

2.7 m3

Hot tap water storage


Total capacity of boilers with energy source

900 kW, gas (2 450 kW)

Type of hot tap water heating


Type of heating system



Total cost solar system

206,000 Euro

Cost of the CSTS / gross area of collectors

275 Euro/m2


not available


Output of solar heat**)

363,000 kWh/a

Reduction of final energy***)

448,000 kWh/a

CO2-emissions avoided

83 t CO2/a

Solar performance guarantee


*) Aperture area = light transmitting area of the front glass
**) measured, between storage and piping to taps (solar system output)
***) related to the measured output mentioned before



Henk Schriekenberg, technical pool manager :

"The solar system has been functioning very reliable since 17 years. We try to squeeze out all the solar heat gain possible by efficiently incorporating the system in our pool operation. The system contributes to keeping our energy costs acceptable in this time of fast growing energy prices."




Zwembad de Zwoer
Schellingerlaan 20
3971 BX Driebergen-Rijsenburg, Netherlands
Phone: +31 343 516722


See owner

System manufacturer 

ATAG Verwarming Nederland BV
Postbus 105
7130 AC Lichtenvoorde, The Netherlands


P.O box 1427
5602 BK Eindhoven, The Netherlands

Top of page Project summary Technical description Financing Development Downloads


Coming soon

Top of page Project summary Technical description Financing Development Downloads

Photo gallery