1. Performance and potential of thermal insulating shutters
Roman PARATSCHA
Sustainable Constructions
Depatment of Civil Engineering and Natural Hazards, University of Natural Ressources and Life Sciences, Vienna,

2. Multifunctionality of insulating shutters
Basic properties of a window:
Thermal insulation
Shading and lightcontrol
Fire protection
Air and water tightness
Acoustic protection

3. Multifunctionality of insulating shutters
Special functions of a window:
Fall protection
Energy production
Burglary protection
Natural hazard protection
Ecology

4. Shading and thermal gains
Additional insulation
Solar gains
Shading

5. Construction

6. Thermal insulation U-value according to ÖNORM EN ISO 10077-1/2
Window + insulating shutter with EPS – insulation board

7. Thermal insulation U-value according to ÖNORM EN ISO 10077-1/2
Window + insulating shutter with vacuum – insulation board
Quelle: Roman Paratscha

8. Thermal simulation
2D thermal bridge simulation with AnTherm® (EN ISO 10077)
Uw = 1,1 W/m²K
Ueff = 0,5 W/m²K

9. Thermal simulation Dynamic simulation with TRNSYS and
semi-synthetic reference year (PV-GIS + METEONORM)
according to ÖNORM EN ISO und ÖNORM EN ISO 10077
Type of inner Window:
• Historical window (Uw=3,0 W/m²K, g=0,76)
• Conventional window (Uw=1,1 W/m²K, g=0,60)
• Passive-house window (Uw=0,8 W/m²K, g=0,51)
Types of climate zones:
• Eastern Austria (Vienna, 220 m)
• Western Austria (Innsbruck, 574 m)
• Alpine (Heiligenblut am Großglockner, 1302 m)
Types of insulating shutters:
• Panel material (Up=0,16 W/m²K)
• Frame material (Uf=2,5 W/m²K)
summer
winter
• average daily temperature of < 10 °C
= night closure from sunset to 07:00 + open position winter
• average daily temperature of > 10 °C
= no night closure + open position summer

10. Simulation results Simulation boundaries
Day with the highest heating demand (15 January)
Day with the highest cooling demand (22 July)
20% of window area on the facade
Type of inner Window:
• Conventional window (Uw=1,1 W/m²K, g=0,60)
Type of climate zone:
• Eastern Austria (Vienna, 220 m)
Type of insulating shutter:
• Panel material (Up=0,16 W/m²K)
• Frame material (Uf=2,5 W/m²K)
Orientation
• South

11. Simulation results
Reduction of heating and cooling demand in different climates
Simulation boundaries
Type of inner Window:
• Conventional window
(Uw=1,1 W/m²K, g=0,60)
Type of insulating shutter:
• Panel material
(Up=0,16 W/m²K)
• Frame material
(Uf=2,5 W/m²K)
Orientation
• South

12. Simulation results INSULATING SHUTTER VS. PASSIVE-HOUSE WINDOW:
Simulation boundaries
Type of inner Window:
• Conventional window
(Uw=1,1 W/m²K, g=0,60)
• Passive-house window
(Uw=0,8 W/m²K, g=0,51)
Type of insulating shutter:
• Panel material
(Up=0,16 W/m²K)
• Frame material
(Uf=2,5 W/m²K)
Orientation
• South
Type of climate zone:
• Eastern Austria (Vienna, 220 m)

13. Simulation results
INSULATING SHUTTER VS. PASSIVE-HOUSE WINDOW:

14. Conclusion
Depending on the quality of the inner window, an improvement of the U-value between 50 % and 80 % can be achieved.
It can be said that an apartment with insulating shutter combination in Vienna is always accounting better for around 10 kWh/m²NFA then a apartment with passive house window.
The addition of an insulating shutter is quite an alternative to window replacement.
Optimization through improved control of insulating shutters is quite possible.

15. Thank you for your attention