De Grevelingen

's-Hertogenbosch, Netherlands

Old people's home | 100 sqm installation

Project summary only


Project summary · Technical description · Financing · Development · Downloads

Project Summary


Social housing association WoonVeste realised a 96 m2 collective solar thermal system on the roof of one of their apartment buildings homes for elderly people. The realisation of this system fits in the associations’ mission regarding the environment. As part of these environmental policies Woonveste actively aims to reduce energy and water consumption and promotes the use of renewable energy systems in it’s building stock. Some of the senior tenants were initially rather skeptical about the system as they had to pay more rent. Since the system is running and energy costs have lowered with twice the extra rent they have to pay, all tenants are satisfied with the system. For the realisation Woonveste was supported by the project Space for Solar providing feasibility studies, an interesting turn-key offer based on a call for tender and an investment subsidy.




Type of building

Old people's home

Number of users / dwellings, floors

105 dwellings
3 floors

Year of construction


Total effective area (heated)

not available

Hot tap water consumption (measured/estimated)

1,748 m3/a (calculated)

Whole energy consumption for heating purpose after CSTS implementation

97,250 kWh/a

System engineering

Year of construction of CSTS


Type of collectors

Flat plate collectors

Thermal power

67 kWtherm.

Aperture area of collectors*)

96 m2

Buffer storage

3 m3

Hot tap water storage

1.3 m3

Total capacity of boilers with energy source

not available
(natural gas)

Type of hot tap water heating


Type of heating system



Total cost solar system

47,900 Euro

Cost of the CSTS / gross area of collectors

500 Euro/m2


33 %


Output of solar heat**)

38,900 kWh/a

Reduction of final energy***)

55,500 kWh/a

CO2-emissions avoided

11.7 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



J. Dekkers, manager technical development:

"When the decision was made to install a solar water heater not all tenant were happy because they had to pay more rent. But now, the solar water heater is working and overall energy costs are lowered with twice the extra rent, all tenants are satisfied. Woonveste will continue its mission to install renewable energy systems in its building stock."





Housing association WoonVeste
Afrikalaan 92
P.O. Box 127
5150 AC DRUNEN, Netherlands


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