uPVC Windows

KF 520 uPVC Windows

Our KF 520 uPVC windows are the perfect blend of high performance and modern design. Available nationwide from ecoHaus, these triple glazed windows have a seamless stylng which is facilitated by slim sightlines and all round bonding of the glass panel within the window sash. Visually, the KF 520 uPVC windows appear to have fixed glazing, with the sash appearing to be invisible externally.

uPVC windows Swindon

Thermal Insulation (in W/m2K):

Uw up to 0.63


Sound Reduction (in dB):

33 - 46



Secured by Design & PAS 24

More Info

With optional RC2 and RC3 protection from burglars or other intruders, our KF 520 uPVC windows are extremely secure. These triple glazed windows are accredited by Secured by Design and are fully compliant with PAS 24:16 security regulations. The KF 520 uPVC windows include a hidden integrated locking system which adds extra security – all of these equates to complete peace of mind for homeowners and other end users alike. Contact us today to request a quote for our KF 520 uPVC windows.

Technical Specifications

Dimension (in mm) Opening Versions Gaskets
Frame construction depth 90
Quantity 3
View width frame/sash 85
Turn and turn/tilt
Colour Light grey
View width flying mullion (2 sashes) 96
View width transom/mullion (2 sashes) 148
Sliding window
Lockable doors
Sliding doors
Doors with threshold
Outward opening doors

Features & Benefits

Seamless Design

With minimal sightlines, our KF 520 uPVC windows have large glass panes which maximise the amount of natural light in the property. These triple glazed windows provide open and uninterrupted views of any outdoor spaces.

Heat Insulation

Our unique Internorm I-tec Glazing technology included in our KF 520 uPVC windows creates optimal U-values of just 0.63W/m2k. These triple glazed windows also have sound reduction properties of up to 46 dB.

Security Components

Innovative Internorm I-tec Secure technology includes integrated flaps which cannot be levered to open the window. Our KF 520 uPVC windows are designed to provide advanced protection from burglars or intruders.

aluminium sliding doors supplier

KF 520 uPVC Window Prices

Call 0800 612 6519 or fill out our online contact form to discuss your project with the Swindon based team of ecoHaus experts. They will be able to price up your project and give you any additional details which you require. Use our online contact form to ask any questions which you may have and receive more information on our manufacture, supply and install process. Book an appointment to visit one of our showrooms and use our Find A Showroom tool to locate the closest one to you.

Extra Features


These Internorm uPVC windows are available with a range of hardware and accessories that complement both their overall design, and your chosen hue.

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Window Hardware Installers Gloucestershire

Case Studies

Read our case studies to see previous homes and commercial buildings which we have installed our windows in. You can explore before and after pictures of our installation process and see how our windows can adapt to a range of properties.

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Minimal Frame Aluminium Windows Gloucestershire


Visit one of our showrooms across England and Scotland to see our products in real life and check small details. Our product specialists will be happy to help you with the pricing of your project and additional information.

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sliding door showroom

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