Tilburg, Netherlands

Multi-family house | 354 sqm installation

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Project summary · Technical description · Financing · Development · Downloads

Project Summary


Social housing association WonenBreburg realised a 354 m2 collective solar thermal system on the roof of one of their apartment buildings with 16 floors and 256 dwellings. The system is placed as part of an overall renovation of the building. Small individual gas-fired kitchen tap water heaters that emitted exhaust gases into the dwellings have been replaced by a central solar hot water system and the ventilation system has been improved. Furthermore the mostly senior tenants were offered freedom of choice between several packages for renovation of the bathroom, kitchen and toilet. The realisation of this system fits in WonenBreburg’s policies and in the energy covenant agreements closed between the social housing associations in Tilburg and the municipality.




Type of building

Multi-family house

Number of users / dwellings, floors

256 dwellings
16 floors

Year of construction


Total effective area (heated)

25,088 m2

Hot tap water consumption (measured/estimated)

4,672 m3/a (calculated)

Whole energy consumption for tapwater heating purpose after CSTS implementation

523,264 kWh/a

System engineering

Year of construction of CSTS


Type of collectors

Flat plate collectors

Thermal power

248 kWtherm.

Aperture area of collectors*)

354 m2

Buffer storage

9 m3

Hot tap water storage

not available 

Total capacity of boilers with energy source

not availbale
(district heating)

Type of hot tap water heating


Type of heating system



Total cost solar system

272,000 Euro

Cost of the CSTS / gross area of collectors

768 Euro/ m2


11 %


Output of solar heat**)

162,250 kWh/a

Reduction of final energy***)

232,000 kWh/a

CO2-emissions avoided

43 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



W. van Koert, manager new construction/refurbishment:


Housing association
J. van Oisterwijkstraat 35
P.O. Box 409
5000 AK Tilburg, Netherlands

System manufacturer 

Itho BV
P.O. Box 21
3100 AA Schiedam, Netherlands


Sebregts Installatietechniek BV
P.O. Box 44
5056 ZG Berkel-Enschot, Netherlands

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