Hospital · Dynamic building envelope
Dynamic building envelope in hospital: what the SRI measures
The envelope is dynamic when shading and windows respond automatically: shading that closes in bright sun and opens for free heat in winter, and windows that open for night cooling. Reporting on performance is included.
In short
- 1This page shows how the Dynamic Building Envelope domain is assessed within the Smart Readiness Indicator for hospitals.
- 2Hospitals typically exceed the 290 kW installation capacity threshold from the EPBD due to their high energy demands.
- 3The domain counts as 1 of the 3 key functionalities, with services for solar shading, windows and building envelope reporting.
Weight of this domain for this building type
Which services count
| Service | Lowest level | Highest level | Advice |
|---|---|---|---|
| Window solar shading control DE-1 · A · 5 levels | No sun shading or only manual operation | Predictive blind control (e.g. based on weather forecast) | at least level 1 |
| Window open/closed control, combined with HVAC system DE-2 · 4 levels | Manual operation or only fixed windows | Level 2 + Centralized coordination of operable windows, e.g. to control free natural night cooling | – |
| Reporting information regarding performance of dynamic building envelope systems DE-4 · A · 5 levels | No reporting | Position of each product, fault detection, predictive maintenance, real-time & historical sensor data (wind, lux, temperature...) | at least level 1 |
Worked example
If everything in this domain is at level 0, the domain contributes nothing. At the highest level for all services, the indicative total score for this building type rises by about 6 percentage points (from 33 to 39 percent, with all other domains at level 1).
What is the Smart Readiness Indicator for a hospital?
The Smart Readiness Indicator (SRI) is a score showing how well a building uses smart technology. For hospitals this matters because they rank among the most installation-intensive buildings. Air handling system capacity almost always exceeds 290 kW.
Above this threshold, building automation and control systems have been mandatory since late 2024, under article 13 of the EPBD (Energy Performance of Buildings Directive). The SRI itself remains voluntary, but is expected to become mandatory by 30 June 2027 for utility buildings above this limit.
What does the Dynamic Building Envelope domain measure?
Dynamic Building Envelope (DE) concerns how facade, solar shading and windows respond automatically to light, heat and weather. Solar shading that closes in bright sun and opens to capture free warmth is an example.
For hospitals this domain counts as 1 of the 3 key functionalities, which are equally weighted main categories in the SRI methodology. This is a limited but not negligible share of the total score.
The domain contains three smart-ready services: solar shading control, window opening and closing linked to the building management system (BMS), and building envelope performance reporting.
Which functionality levels are relevant?
For DE-1, solar shading control, the level ranges from no or manual operation to predictive control based on weather forecasts. Hospitals with extensive building management systems often already achieve level 2 or higher.
DE-2 assesses whether windows open or close automatically in coordination with the heating or cooling system. Higher levels link this to centralised control for natural night cooling.
DE-4 concerns reporting: from simple fault detection to real-time and historical sensor data on wind, light and temperature. This aligns with the need for reliable monitoring in a hospital environment.
Why is this relevant specifically for hospitals?
Hospitals often already have backup power, storage and an extensive building management system in place. This makes it easier to also connect the building envelope intelligently to other systems.
Given building size, energy flexibility is a realistic option, which can raise the score in this domain. Yet the building envelope often remains secondary to medical installations in investment decisions.
What this means for you
- Owner
- Have existing solar shading and window control systems assessed for their integration with the building management system, as small adjustments can already raise the functionality level. This domain carries less weight than other key functionalities, but does contribute to a higher class in the overall SRI score.
- Tenant
- Patients and staff primarily notice a dynamic building envelope through a more stable indoor climate, with less intense sun or overheating in certain spaces. Automatic solar shading and ventilation improve comfort without manual intervention needed.
- Advisor
- When assessing, verify that solar shading and windows are actually linked to sensor data or the building management system, not merely motorised. Also note the reporting level: fault detection alone yields a lower level than real-time and historical sensor data.
Next step
Want to know where your building stands?