The Corona CT70 is a proven window system featuring 70 mm thick 5-chamber profiles by the renowned German manufacturer Schüco. The windows are suitable for use in new construction and renovated buildings. The energy efficiency of the profiles is medium class, but by installing better insulated glazing, the windows can also be used in low-energy buildings (window Uw value up to 1.0 W/m2K).


  • Design
  • Glazing
  • Surface colours
  • Technical details
  • Security and hardware
  • Advantages

CT70 Classic

A modern design with classic angular lines that match the modern furnishings of the ambiance. 




CT70 AS Classic



CT70 Rondo

It features soft, round lines and smooth surfaces that give the building a touch of elegance.




CT70 AS Rondo


Glass covers the major part of the window area and has a significant impact on the thermal and acoustic performance of the window. The glass also lets natural light and solar energy into the room.


For the CT70 vinyl window, we offer the following:

  • Double or triple glazing
  • Aluminium, stainless steel or plastic spacers
  • Thermal transmittance of glass: Ug from 1.1 to 0.5 W/m2K
  • Acoustic performance of glass: Rw from 32 to 37 dB
  • Solar energy transmittance of glass: g-values from 34% to 63%
  • Various safety glass, ornament and muntin grille designs


Inles windows use glass that is produced in Slovenia by the quality Austrian manufacturer Ertl glas.

Have a look at the comprehensive selection of Inles thermal and sound insulating glass and safety glass.



Pvc Paleta
  • A broad selection of modern standard and RAL colours and decors
  • Special films with various metallic looks 
  • Optional two-colour combinations (inside/outside)



In our offering, we have a wide variety of colour surfaces, including surfaces with a metallic appearance, wood decor imitations, structured surfaces and colours according to the RAL chart. The films used on the vinyl profiles are proven and highly weather- and wearproof. With a wide range of colour surfaces available, we are confident that you will be able to find a nuance to suit your taste.



The CT70 vinyl window is a technically sophisticated and tried and tested product. The rich standard equipment and quality of built-in materials ensure that even the standard windows meet and indeed exceed the market’s requirements. The product has been tested at reputable institutes and features excellent thermal transmittance, airtightness and watertightness.

Technical brochure

Read the brochure on the equipment, possible implementations and thermal performance of the product.


Download the brochure


        CE mark

The product is labelled with the CE marking and is compliant with EU directives on free marketability on the EU market.

Declaration of Conformity






Builders’ joinery openings are the only way for bad guys to enter your home. This is why it is important to choose products with a high level of security.

Inles building hardware features a high level of security (RC1) that can be upgraded even further. For the CT70 vinyl window, we offer the following:

  • Tested equipment with grade RC1 and RC2 security level certificates
  • MVS contact elements with window opening indicator (alarm)
  • Sponge-like closing members that prevent the casement from being removed from the frame
  • Various models and safety glass levels




 Certifikat WK2



Grade RC1 security hardwere 

Additional security - the RC2 hardwere 

  • High-quality, structurally solid and durable window profiles by the German manufacturer Schüco
  • State-of-the-art computer-controlled production line
  • Products certified and tested by European institutes
  • Own test equipment to verify watertightness, airtightness and the strength of the angular welded joints according to European and our own standards and norms
  • Energy-saving profiles
  • Standard window hardware features a high level of security that can be upgraded even further
  • Wide variety of colour films, including films with a metallic appearance, wood decors and structured surfaces
  • Various ventilation systems
  • Warranty and reliable after-sales services
  • Secure purchase
CT70 AS RondoCT70 AS Classic

Window U-value calculation 

Check calculations heat transfer of all our windows in combination with a variety of glazing.