The SI82 ALU INSIDE window system includes products with energy-saving 7-chamber profiles that support the insertion of PUR insulation foam. The products boast superior thermal performance and can be installed in better low-energy and even passive buildings (window Uw value up to 0.66 W/m2K).
The profiles with the built-in insulation foam are certified by the Passivhaus Institut from Darmstadt. Aluminium reinforcing profiles give the product structural stability and positively impact its thermal characteristics.

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

SI82 Alu Inside

A window system with aluminium reinforcing profiles that improve its thermal characteristics. It boasts a lower overall height of the frame and casement, thus permitting more natural light into the room.



SI82 Alu Inside


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.



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 SI82 Alu Inside vinyl window, we offer the following:

  • Triple glazing filled with argon or krypton
  • 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.



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 SI82 Alu Inside 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


Rc2 Eng 


 Certifikat WK2



Grade RC1 security hardwere 

Additional security - the RC2 hardwere 

The SI82 Alu Inside 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 Ico CE Znak




  • 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 that can even be used in passive buildings
  • 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
SI82 Alu InsideSI82 Alu Inside PASSIV Dr FeistSI82 Alu Inside PASSIV

Window U-value calculation 

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