Helio-tracking façades are advanced building envelope systems designed to adjust their orientation or shading elements in response to the sun’s position. By optimising solar exposure throughout the day, these façades can reduce cooling loads, improve daylighting, and enhance occupant comfort.
While these systems offer clear environmental and comfort benefits, their influence on Energy Performance Certificate (EPC) cooling projections is complex.
How Helio-Tracking Façades Work
Helio-tracking façades use sensors and automated controls to:
Track solar movement and adjust shading panels or louvers accordingly.
Maximise daylight while limiting direct solar heat gain in summer.
Adapt seasonally to allow more sunlight in winter for passive heating.
This dynamic behaviour can significantly reduce the annual cooling energy demand, but EPC modelling tools often assume static façade characteristics.
EPC Modelling Challenges
When assessing buildings with helio-tracking façades, EPC software faces several limitations:
Static envelope inputs: Standard EPC models do not simulate real-time shading adjustments.
Over-simplified solar gain factors: They apply fixed shading coefficients rather than variable, sun-position-dependent data.
Regional performance differences: In hot climates, EPC gains may be understated; in mixed climates, winter benefits may not be fully captured.
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Residential EPC Implications
Although helio-tracking façades are more common in commercial and high-end residential projects, their benefits can still be reflected in an EPC report — if modelled correctly. Our Residential EPC service ensures such systems are documented and explained in assessor notes.
Fast EPC Certification for Innovative Buildings
If your property features helio-tracking façades and you need rapid certification, our Same Day Energy Performance Certificate (EPC) service provides fast, accurate assessments.
Cost Considerations
Helio-tracking façades often involve high upfront investment. For EPC-related service pricing, see our Pricing Plan page.
Get Expert Advice
Want to know how your façade technology will influence EPC cooling projections? Speak to our assessors via our Contact Us page.
