Double-glazed window for better insulation of buildings

©izikmd, image #142226587, 2017, source: Fotolia.com

Information

Impacts:
Energy
Sector:
Cross-cutting
Investment cost:
Medium cost
Cost savings:
Annual: £1153,00 ( € 1256,77 ) Windows rated A+ can save up to 25% on energy bill, while B rater windows offer 5-8% savings. The cost savings also depend on the size of the house, the geographical location and the climatic condition of the location, and overall insulation level applied in the building.
Investment cost:
Investment cost indicated above is per squared meter of window; thus the total cost of the refurbishment will depend the size of the building or room and the number of windows in there. For an industrial room with 15 windows of 2 sq.m each the upgrade would cost around €10,000 (£9,000 or €9,810 for the entire project, with a price of £300 or € 327/m2). There is a minimal risk if installation is carried out correctly. Once installed maintenance is minimal.
Payback time:
Payback time in the project presented in the assumption below was 7,8 years (94 month). Other studies report payback time between 12 months up to 52 months. The reason for such diverse results are in the different setting, local conditions, heating expenses in the baseline case. It is more likely that the double or triple glaze windows can result in higher savings and shorter payback time than in the areas with colder climate, due to higher heating expenses.
Cost:
Medium cost
Resource savings: Energy:
Annual: Reduced heat loss and energy consumption. 12812 kWh. 2363 kg CO2e.

Is double-glazing for you? Absolutely

Having double-glazed windows installed is one of the best-known and effective ways to reduce energy bills in countries with colder winters. This technology can help to reduce heat loss and limit condensation, which also cuts heating costs, and they provide better insulation against outside noise.

Insulated glass or ‘double-pane’ technology comes in double- and increasingly triple-glazed forms. It consists of two or three glass window panes separated by a vacuum or gas-filled space to reduce heat transfer through this vital feature of the so-called ‘building envelope’.

Tip

These insulated units are typically made with 3-10 mm thick glass, but can also be tailored for special applications, such as acoustic attenuation or security glass. Laminated or tempered glass may also be used.

Thermal insulation Energy savings Heating, ventilating, and air conditioning

EAUC-Scotland and Resource Efficient Scotland (RES), Energy Efficiency Technologies Catalogue, http://www.sustainabilityexchange.ac.uk/energy_efficiency_technologies_…

EC, Green Public Procurement: Windows Technical Background Report - Windows, Glazed Doors and Skylights, link: http://ec.europa.eu/environment/gpp/pdf/windows_GPP_background_report.p…

Confused About Energy, free information portal, Double glazed window section, link: https://www.confusedaboutenergy.co.uk/index.php/heat-loss-and-insulatio…

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