Project Delft
On behalf of Inventum, we worked with ROEF to implement and test the integration of the Burgerhout Elytra roof penetration into a green roof fitted with solar panels. This was not a theoretical design, but involved actually applying and testing it in practice.
In short
- Location: The Green Village (Project DreamHûs), Delft
- Type project Practical test / development
- Partners: ROEF and Inventum
- Period: 2025
- Application Green roof with integrated solar panels
- Solution: Burgerhout Elytra combined roof duct, used in conjunction with an indoor heat pump and a green roof
The challenge
Combining multiple functions on one roof requires careful coordination, with limited space and the influence of air currents on the green roof making the positioning of installations crucial:
- Integration of installations without disruption to the roof design
- Retention of waterproofing and technical performance
- Alignment with green roof and solar panels
- Potential for future modifications
To test the practical application, the roof termination was installed on-site and connected to an internally located heat pump. This tested not only the integration but also the functionality of the complete solution.
The result
The practical test shows that the integration of a roof penetration into a green roof with solar panels is feasible.
• Integration into dummy panel without disrupting the roofline
• Applicable in both new construction and renovation
• Practically feasible in the workplace
Understanding the influence of air currents on vegetation
Local vegetation differences are visible around the roof penetration. This provides insight into the influence of air currents and helps determine the correct positioning of installations on a green roof.
Why this solution
The combination of a Burgerhout Elytra combined roof penetration and a modular green roof system offers benefits for:
Roofs with combined functions (green, PV and installations)
• Projects whereStandardisation and prefabrication are the starting point
Situations in which flexibility and adaptability are important
• Renovation projects where the roof cannot be fully adapted
The modular construction allows installations to be added or modified later without major work.
Practical experience
Our initial assumption was correct: you can easily retrofit an indoor heat pump into a ROEF roof using the Burgerhout Elytra roof duct. And this is only going to become more common.
Sander Smeets, Product and Process Developer at ROEF
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