2.1.15 Installation of efficient windows (solar control double glazing with aluminium frames with thermal break)
Description
This measure consists in the replacement of inefficient windows (e.g. aluminium frame without thermal brake and single glazing) for an efficient one with solar control double glazing and aluminium frames with thermal brake. Solar control glasses have the property of reflecting part of the energy of the received solar radiation, decreasing the amount of energy that passes through the glass. A typical transmittance of this type of windows is U=1.8 W/m2K.
Benefits
Airtightness improved
Sound insulation
Safety
Easy cleaning
The aluminum frame is available in various colors
Aluminum is a strong and rigid material, its properties do not change with the weather and its rigidity is ensured at high and low temperatures
Solar control glasses cut utility costs by 30% to 40%
Solar control glasses can block 99% of UV light that fades furniture
Limitations
The energy consumption for aluminium manufacturing is high.
Double glazing cannot be repaired
During the summer months, trapping heat inside glass panes can lead to a stale and uncomfortable room
The most common complaint of this frame is that in winter the aluminum sweat
It is a cooler material than wood and PVC
Over time, the aluminum can become corroded
Can reduce valuable solar heat gain in colder climates
Economic assessment
Initial investment: high. The price varies greatly, depending on the size of the window and manufacturers. Energy costs are reduced.
References and best practices
Solar control glass for greater energy efficiency:
www.glassforeurope.com/images/cont/116_6969_file.pdf- Solar control coating on glass:
www.sciencedirect.com/science/article/pii/S1359028698800491
CHARACTERIZATION
Environment or playable world:
Residential
Academic
Offices
All
Carried out by:
Public building users
Owners
Operators
All
Reduce consumption of:
Heating
Cooling
DHW
Lighting
Electric devices
Type of driver:
Physical environmental
Contextual
Psychological
Physiological
Social
Time framework:
- Short term
- Long term
Type of measure:
- Envelope
- HVAC
- DHW
- Lighting
- Electrical devices
- Other