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You reduced warmth loss, meet London s rigorous Part L and Part O requirements, and improve your EPC score when you specify <strong>high efficiency, low U value glazing</strong> tailored to your home. Purpose for <strong>whole home window U worths 1.2 W/m K</strong>, g values around 0.35 0.55, and verified test information (EN 14351 1, EN 1279). Consider noise, alignment, and any preservation or noted status, after that utilize certified installers (FENSA/CERTASS) to guarantee compliance and assist in more performance gains.




<h2>Trick understandings</h2>




<ul>


<li>Pick home windows with whole-window U-values 1.2 W/m K and at the very least a B energy rating to satisfy and surpass London Building Rules.</li>


<li>Use low-e dual or triple glazing with argon-filled cavities and warm-edge spacers to cut warm loss by up to 65% compared with solitary glazing.</li>


<li>Control overheating in London homes