What Does an A+6 Energy Rating Mean?
When choosing new windows, energy efficiency is one of the most important factors to consider. At Prime Windows North East, we’re proud to offer A+6 energy rated windows—some of the highest-performing glazing solutions available in the UK.
Understanding the Rating
The Window Energy Rating (WER) is an official scale overseen by the British Fenestration Rating Council (BFRC). It runs from G (least efficient) up to A++ (most efficient).
A+ means the window already exceeds standard performance.
The “+6” goes even further—it represents a net energy gain of 6 kilowatt hours per square metre, per year.
In simple terms:
➡ An A+6 window performs better than a standard A-rated window, keeping your home warmer, reducing heat loss, and helping cut down your energy bills.
How It Works
The rating is calculated using three key factors:
U-value – how well the window prevents heat escaping
G-value – how much beneficial solar heat it lets in
L-value – how airtight the window is, reducing draughts
Together, these factors show how efficiently a window can improve your home’s comfort and energy use.
Benefits of A+6 Windows
✅ Lower Heating Bills – less heat escapes, meaning you spend less on energy.
✅ Improved Insulation – advanced glazing keeps your home warmer in winter and cooler in summer.
✅ Reduced Carbon Footprint – a greener choice for eco-conscious homeowners.
✅ Increased Comfort – fewer draughts and cold spots for a cosier home.
Why Choose Prime Windows NE?
At Prime Windows North East, we don’t just supply high-performance products—we install them with precision and care. Our team ensures your A+6 windows deliver maximum energy efficiency, long-lasting durability, and stylish design to suit your home.
📞 Call us today on 0191 612 0222 to learn more about A+6 rated windows and book your free consultation.


Call us today on 0191 612 0222
for a free consultation and no-obligation quote.