The 80 mm thick energy-saving wooden window is a contemporary natural product. Installing a core made from PUR insulation foam provides excellent thermal performance without affecting external appearance. The product is suitable for use in new construction and renovated low-energy buildings. It can also be fitted in passive buildings by installing better insulated glazing.

The wooden windows from this product range are distinguished by the structurally stable mortise and tenon corner joints, the high-quality precision processing of the wood profiles using a new, technologically advanced production line and comprehensive triple-layer surface treatment. The product meets the criteria of the Eco Fund of the Republic of Slovenia.

  • Design
  • Wood types and colours
  • Glazing
  • Security
  • Technical details
  • Advantages


Wooden window with a classic design. Its trendy angular lines nicely match the architecture of modern buildings.




Iso 80 Pur









We offer a broad selection of colour coatings for wood in compliance with the Inles and RAL colour charts. The coatings are water based and environmentally friendly.



Inles carries out surface treatment using environmentally-friendly protective coatings, which are the main factor in the longevity, durability and appearance of wood products. At Inles, we have dedicated a lot of attention to the matter and are proud of our robotic electrostatic final coating of wood products. With a wide range of shades available, we are confident that you will be able to find a nuance to suit your taste.


The undercoating agent protects the wood from fungi and insects and evens any colour differences in the wood. The intermediate layer seals off any pores in the wood for an even and smooth surface. During the final robotic electrostatic stage, the coating is evenly applied across the entire surface of the workpiece, producing a more durable and visually sophisticated product.


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.


The following options are available for the ISO-80 PUR wooden window:

  • Aluminium, stainless steel or plastic spacers
  • Thermal transmittance of glass: Ug from 0.5 to 0.7 W/m2K 
  • Acoustic performance of glass: Rw from 32 to 37 dB
  • Solar energy transmittance of glass: g-values from 34% to 50%
  • Various safety glass and muntin grille designs


The panes are sealed using permanent elastic seals that match the colour of the product. 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. The following options are available for the ISO-80 PUR wooden window:

  • Tested equipment with a grade RC2 security level certificate
  • 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 ISO-80 PUR wooden 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



  • All corner joints on the frame and casement are the mortise and tenon type
  • There are no cuts for insulation foam in the joint sections – unchanged structural strength
  • We use only quality wood that meets the RAL quality criteria according to DIN 6836
  • The built-in hard PUR foam is environmentally sound and subsequently represents inert industrial waste
  • Triple-layer surface treatment using electrostatic coating
  • Thermally insulating drip cap is part of standard equipment
  • High level of security of the standard hardware
  • Permanent elastic seals ensure superior airtightness and watertightness, which are constantly controlled using our own testing machine
  • Certified and tested product
  • Broad selection of muntin grilles, glass types, handles, coatings, etc.
Iso 80 PurISO80purFenster

Window U-value calculation 

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