The 2022 National Construction Code (NCC) raised the minimum Nationwide House Energy Rating Scheme (NatHERS) rating for new residential buildings to 7 stars, up from the previous 6 star requirement. The change is designed to make homes more energy efficient, comfortable and resilient to extreme weather while reducing energy consumption. Windows play an important role in a home’s overall NatHERS performance, making 7 star energy windows an important consideration for new builds and home upgrades.
7 Star uPVC Windows in Melbourne
Astellite supplies and installs German-engineered Aluplast uPVC windows in Melbourne, designed to minimise thermal transfer. Windows can account for up to 40% of a building’s heat loss. But Aluplast uPVC double glazed windows offer industry-leading thermal insulation properties, minimising heat loss/gain and reducing energy usage throughout your home.
How 7 Star Energy Windows Contribute to NatHERS Performance
Achieving a 7 star NatHERS rating requires attention to the whole building envelope, but windows are one of the highest-impact elements. The performance of the window system depends on factors including the glazing, frame, thermal properties and airtightness.
Low U-value: The U-value measures how much heat passes through the window from inside to outside. A lower U-value means better insulation. Double and triple glazed uPVC windows can achieve significantly lower U-values than single-glazed or some aluminium-framed alternatives.
Solar heat gain control: The solar heat gain coefficient measures how much solar radiation passes through the glass into the home. Selecting the right glass specification helps balance winter solar gain with summer heat rejection, with the appropriate specification depending on factors such as window orientation and climate zone.
Airtightness: Air infiltration through poorly sealed windows can be a significant energy loss pathway. Multi-point locking systems that compress seals evenly around the frame help reduce air leakage and support better thermal performance.
Frame conductivity: uPVC frames have a much lower thermal conductivity than aluminium, which can reduce thermal bridging through the frame and contribute to the overall thermal performance of the window system.
Long-Lasting uPVC Window Performance
Sustainability Victoria is currently offering rebates for builders and land developers to design and build 7-star NatHERS-rated homes and assist with upgrade costs. If you are designing or building a new home, now is the perfect time to factor in 7-star energy window upgrades and enhance your home’s NatHERS efficiency rating and take advantage of the available rebates.
By installing Aluplast double glazed windows – the finest German windows available in Australia – you can significantly improve your home’s insulation, reducing thermal transfer and lowering energy consumption.
Aluplast windows feature premium quality uPVC frames that are incredibly durable and long lasting. With an expected lifespan of more than 30 years, they will stand the test of time with minimal maintenance requirements. They are fire and wind resistant, and UV stabilised. They are entirely pest resistant and will not rot, rust or corrode.
Contact Us
At Astellite, we are professional double glazed uPVC window and doors installers in Melbourne. Our team can help you select suitable window and glazing options based on your property’s requirements and energy performance goals. We provide complete replacement and installation services for double and triple glazed windows and doors for homes and businesses. We even offer custom windows to all properties across Melbourne. Whether you are after awning windows or smart slide doors, Astellite has got you covered.
To find out more about our premium quality double glazed windows and doors, give us a call on 1300 190 409 or contact us online. We can provide you with a free measure and quote or discuss the potential energy efficiency benefits of upgrading your windows.
Frequently Asked Questions About 7 Star Energy Windows
Are 7 star energy windows required for new homes in Melbourne?
The 2022 National Construction Code increased the minimum NatHERS rating for new residential buildings to 7 stars. Windows form part of the overall building envelope and their thermal performance can contribute to the home’s NatHERS assessment.
What are 7 star energy windows?
7 star energy windows are high-performance window systems designed to support the thermal efficiency of a home. Factors such as glazing, U-value, solar heat gain, frame conductivity and airtightness all influence window performance.
Do double glazed windows help achieve a 7 star NatHERS rating?
Double glazed windows can contribute to a home’s thermal performance and support its overall NatHERS assessment. The appropriate window and glazing specification depends on the home’s design, orientation, climate zone and overall energy assessment.
Are uPVC windows suitable for 7 star homes?
Yes. uPVC frames have low thermal conductivity and, when combined with suitable double or triple glazing, can provide strong thermal insulation and help reduce heat transfer through the window system.
What type of windows are best for a 7 star home?
The most suitable windows depend on the home’s design, orientation, climate zone and NatHERS assessment. High-performance uPVC windows with appropriate double or triple glazing can provide strong insulation, while the glass specification, U-value and solar heat gain characteristics should also be considered.
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