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Warm windows and much more

There has been a lot of talk recently about passive or low-energy houses and warm windows. What does it mean? Now more than ever, we focus on minimising energy losses and spending the money as efficiently as possible when heating the house or cooling it in the heat of summer. For this reason, terms related to heat and energy efficiency have become fashionable – and rightly so.

So what can be done to minimise energy loss in window joinery?   

You should invest in windows and sliding constructions with parameters that allow for effective thermal insulation as most heat escapes through windows with poor parameters, especially when poorly installed.

When choosing windows, you should turn to companies with experience, a wide range of offers, and a focus on effective advice for specific requirements. These criteria are met by Okno-Pol, Kraków. Our consultants with extensive knowledge of thermal efficiency improvement help customers to pay attention to the most important aspects of insulation, i.e. heat transfer coefficient (Uw) and so-called “warm installation”. The heat transfer coefficient should be as low as possible for the best thermal insulation. According to current guidelines, it cannot be higher than 0.9 W/(m2K). The value of this parameter depends on the construction of the window profile (number of chamber and insulating elements), the size and composition of the double-glazing unit, the spacers, and the method of installation. Warm installation involves the use of three layers of sealing to prevent leaks and the ingress of moisture.

 

Windows with the best insulation properties are characterised by:

  • profiles: large number of chambers (for PVC windows), special thermal inserts
  • triple glazing sealed unit: three panes of glass connected by a plastic spacer with chambers filled with noble gas.
  • Contrary to appearances, most heat escapes through the connection between the pane and the frame and not through the panes. Therefore, the larger the areas of glazing without divisions, the lower the Uw coefficient
  • installing external roller shutters  and lowering them at night can significantly reduce heat loss

Okno-Pol offers windows made of PVC, aluminium, or wood that suit all requirements and are designed for special uses. Despite the fact that many other constructions have very favourable thermal insulation properties, you should pay attention to the systems that we particularly recommend for passive and low-energy houses:

 

  • PVC: Kömmerling 88MD system with the parameters of a passive window, 7-chamber profile, and the possibility of using a triple-glazing sealed unit and large glazing areas

  • Aluminium: Reynaers MasterLine 10 system – a system with passive building certification and the possibility of using burglar protection up to class 3

  • Aluminium: Schüco AWS90 system – premium system with the best thermal insulation properties, foam thermal breaks, and the possibility of automation (TipTronic)

  • Wood with an aluminum cladding – the Passiv system – the best thermal properties in an elegant wooden system, additional seals, an expanded main seal, with the option to choose from various types of wood and different colors for both the wood and the cladding.

     

In addition to windows designed specifically for passive houses, you should learn about the full offer from Okno-Pol. Bear in mind that favourable parameters can also be achieved using other systems. Thanks to the manufacturer’s competitive prices, the customer can afford more and there is plenty to choose from. PVC, aluminium, wood, and steel constructions can be fitted with roller blinds, shutters, mosquito nets, automation systems, special glass, or additional burglary protection. Thanks to the wide range of materials, finishes, colours, and accessories, you can create a bespoke joinery that is able to protect, decorate and provide more light to any interior. Okno-Pol is not afraid of challenges and also welcomes customers with high demands and non-standard ideas.