Aluminium windows can be exceptionally energy efficient with advanced designs and premium-grade window materials. Origin’s precision engineered windows are designed to improve the thermal efficiency of a home by limiting the amount of heat loss and excluding draughts. They can reduce the cost of energy bills, reduce your carbon footprint and help your home maintain a comfortable temperature year-round.
Click on one of the sections below to learn more:
How effective are energy efficient windows?
The effectiveness of energy efficient windows will be demonstrated by its energy rating. Windows are rated from A++ to E, with E being the least insulating. All new windows are required to be at least C rated by British Building Regulations. According to Which?, fitting a B-rated window instead of a C-rated window saves around 6.5% on energy bills. A rated windows retain the temperature inside the most efficiently.
The energy efficiency rating is based on the following factors:
· How much air can leak through the frames or locks
· How much heat can penetrate the panes of glass from sunlight
· How much environmental heat they transfer
· How much heat passes across the frames and other materials
Only the most thermally efficient windows will achieve an A++ energy rating, and both Origin Window systems can achieve this. The Origin Premium Window (OW80), when upgraded with Aerogel, can offer a U-Value of just 0.8. Aerogel can increase the insulation of windows up to 67% and Origin is the only company in the UK to offer windows with this super-insulating technology as an optional upgrade. The Slimline Window (OW70) also comfortably exceeds building regulations, achieving a U-Value of 1.2.
Comparing the energy efficiency of aluminium, timber and uPVC windows
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Different window materials have varying degrees of conductivity which means they resist heat loss and heat gain to different extents. Timber is naturally quite thermally resistant. Meanwhile, aluminium has a lower conductivity compared to other metals such as steel. When used with thermal break technology, such as a polyamide layer, aluminium can be highly thermally stable. UPVC windows are widely accessible and generally resist heat loss well.
Compare the thermal efficiency of standard window materials
· Origin Aluminium Windows: The OW80 can achieve a U-Value as low as 0.8 and Energy Rating of A when installed with triple glazing and upgraded with Aerogel.
· Modern timber windows: Commonly achieves U-Values between 1.0 and 1.2 with triple glazing. Some manufacturers can match Origin’s thermal efficiency, but the material can be bulky, expensive and require ongoing maintenance.
· UPVC windows: Entry level windows usually achieve a U-Value around 1.2 - 1.4 with triple glazing, but some manufacturers can reach an A rating.
We asked this customer if they would recommend Origin:
“Absolutely. The product is first class and streets ahead of the other options we saw in our price range.”
Ultimately, the energy efficiency largely depends on the material, the design, the quality of the manufacturing, the thermal resistance of the glass panes used and the engineering of the window itself. If you prioritise excellent energy efficiency, Origin engineer beauty and deliver unrivalled thermal performance.
Advantages of energy efficient aluminium windows
Modern aluminium windows – such as Origin’s – use thermal breaks within the window itself. This provides a barrier between the inside and the outside of the frame, and therefore prevents heat from being easily transferred.
Explore the benefits of thermally efficient aluminium windows
· Energy saving – Fitting thermally efficient windows stops heat escaping. As a result, you won’t need to use as much energy to heat your home and this can reduce your energy bills.
· Reduces draughts – Properly insulated windows can eliminate draughts.
· Reduces heat in warm weather – Energy efficient glass panes can keep indoor temperatures cooler in the summer by not letting heat enter the property, keeping cooling costs to a minimum.
· Low maintenance requirements – Aside from routine cleaning which involves using a soft cloth to occasionally wipe the frames down with warm water, mild detergent and a soft cloth. Origin’s premium powder coating requires minimal upkeep.
· Aesthetic appeal – The strong material supports expansive panes of glass with minimal profile in view.
· Structural integrity – Aluminium is much more durable than wood and uPVC, making it a long-lasting alternative which can save on energy bills now and for decades to come.
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Long-term cost savings by choosing energy-efficient replacement windows
Having energy efficient windows reduces your energy costs in the long run. However, advanced technology and triple glazing comes at a larger initial cost. Opting for triple glazing over double improves energy efficiency by around 40-50%, but the overall energy savings will depend on several factors:
· The number of windows and glazed area
· The size of your home
· The insulation of the entire home (including doors, walls, porches and lofts)
· Your current rate for energy and whether you use gas or electricity
Typically, windows account for around 18-25% of heat loss from a home, so for an average 3-bed semi-detached property (approximately £1775 per year in heating bills), you could save approximately £215-£300 per year by replacing G-rated windows with A-rated ones (minimising energy loss through the window by 67%).
Energy Efficient Windows – FAQs
How does the frame contribute to energy efficiency?
All materials conduct heat to varying degrees. If the frames are highly conductive like unbroken steel, they will feel cold or warm to the touch. This means they are transferring heat between the indoors and outdoors. Window frames with excellent insulation properties are necessary for the overall thermal performance of the window, not just the glazing. Features such as thermal breaks and weatherproof seals also contribute to better heat retention.
What energy rating do my windows need to be in order to comply with building regulations?
Building regulations require windows of a new dwelling to have a U-Value of 1.2 or lower. Replacement windows need to have a U-value of 1.4 or lower. For more advice, speak to a professional or contact your local installer.
How much do energy efficient windows cost?
This will depend on the type of window you choose. Triple glazing is more expensive than double glazing, but does offer a higher level of energy efficiency. Aluminium window frames fitted with a thermal break or those made from timber frames generally offer a strong thermal performance, but they are initially more expensive than uPVC.
Do energy efficient windows increase a home’s value?
Fitting improved windows, with double glazing or upgrading to triple glazing can increase the value of your property by up to 10% according to some experts.
Are outdated windows a deal-breaker to buyers? – find out here.
Can I claim tax back on energy efficient windows?
You can’t claim VAT back on energy efficient windows, however, there is currently tax relief on the installation of these products when using a VAT-registered installer. Learn more at gov.uk. Alternatively, review Approved Document L for more information.