/, Contextual, Cooling, Envelope, Heating, Long term, Owners, Physical environmental, Psychological, Social/2.1.12 Installation of efficient windows (low-E double glazing with aluminium frames with thermal break)

2.1.12 Installation of efficient windows (low-E double glazing with aluminium frames with thermal break)

2.1.12 Installation of efficient windows (low-E 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 Low-E double glazing and aluminium frames with thermal brake. Low emissivity glasses are equipped with an invisible metallic coating that reflects inward part of the incident long-wave energy (heating), decreasing the absorption of the own glass and, therefore, the energy that emits to the outside. 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

  • Improve solar and thermal control

  • Reduce summer heat gain and winter heat loss

  • Decrease UV transmission such as furniture fading

  • Reduce condensation in double glazing

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 suffocating and uncomfortable room

  • The most common complaint of this frame is that in winter the aluminum sweat

  • It is a cooler material than the wood and PVC

  • Over time, the aluminum can become corroded

  • Valuable solar heat gain in colder climates can be reduced

Economic assessment

Initial investment: high. It can be estimated an average cost of about 1600€ for each window, but this price vary greatly, depending on the size of the window and manufacturers. Energy costs are reduced.

References and best practices

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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
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2018-01-22T09:14:31+00:00