Duration Windows. A Guide To Energy Efficient Windows

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1 Duration Windows A Guide To Energy Efficient Windows

2 It is important to make the right choices when investing in new windows. Windows can account for up to 30% of the heat ost within a domestic property. When repacing and upgrading the windows in your home it is worth instaing high efficiency rated windows. What are Energy Efficient Windows? They are windows that hep to contain and conserve heat within your home keeping out wind, rain and yet aowing natura free energy to heat your home. What is an Energy Rating? An Energy rating is simpy a scae which informs you of the energy efficiency of your window. The system is based on an A-G scae, the most energy efficient being an A-rating. The scheme is simiar to the energy rating scae found on househod appiances. This scheme provides a very good idea of how environmentay friendy your windows are. U-Vaues Vs energy ratings: The basic U vaue information does not fufi the overa energy rating requirements because it ony aims to give a vaue for the insuation properties of a window. It ony focuses on the heat oss from the window and takes no account of the soar heat gain and how it can improve the overa energy efficiency of the house. 30% of heat is ost through windows

3 How much money can I save? You can save money on your energy bis by instaing Energy Efficient Windows. If your home is singe gazed or your doube-gazing was instaed prior to Apri 2002 then you coud be osing heat, and therefore money, iteray out the window. However, by switching to Energy Efficient Windows you can save energy and reduce your househod bis by as much as 461 per year. Reduce your carbon footprint: You can reduce your carbon footprint if you insta Energy Efficient Windows. If you ive in a singe gazed house and insta Energy Efficient Windows, you coud reduce the amount of carbon your home produces by 0.30 tonnes or 18% - amost reaching the Government target of 23% reduction per househod between 2008 and How much do Energy Efficient Windows cost? The cost varies not ony between the various ratings (A to E) but is aso dependent on the frame materias used and the size and stye of window. A rated windows wi cost more than B, C, D and E rated windows, but this has to be set against the energy savings you wi make as you go up the ratings scae. The rue of thumb is that Energy Efficient Windows generay cost ess than the heat ost through od windows, over a given period of time. Save as much as 461 per year

4 The benefits of having A-rated windows: Reduced energy bis: Up to 461 per year can be saved on your energy bis. A warmer home: cod spots, draughts and heat oss can be greaty reduced with energy efficient gass. A contribution to the environment: Reduced fue consumption wi generate ess carbon dioxide (CO2) that causes goba warming typicay, 680kg a year. How Energy Efficient gazing works: A doube gazed unit is constructed with two sheets of gass and an air gap between each pane. The gap is usuay around 16mm (sometimes fied with gas) which creates an insuating barrier that keeps heat in. Windows that are Energy Efficient come in a variety of frame materias and styes. Other variabes are: How we they stop heat from passing through the windows (U-Vaue) How much sunight traves through the gass (Soar Gain) How itte air can eak in or out around the window Reduce your CO2 emissions

5 What to ook for: Gass: The most energy-efficient gass for doube gazing is ow emissivity (Low-E) gass. This often has an unnoticeabe coating of meta oxide, normay on one of the interna panes next to the gap. This ets in ight and heat but cuts the amount of heat that can get out. In between: Very efficient windows might use gases such as argon, xenon or krypton in the gap between the sheets of gass. Spacer Bars: These are set around the inside edges of the gass to keep the two panes apart. For maximum efficiency, ook for pane spacers containing itte or no meta often known as 'warm edge' spacers. Look for warm edge spacers.

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