What are the types of energy-saving windows – what to look for

Companies that design and manufacture insulating glass are working to improve their products. For this, innovative technological discoveries are actively used. According to statistics, about 30% of all heat generated by heating devices goes outside through window openings. To reduce heat loss, energy-saving plastic windows are installed. This is an innovation in glazing. They are used to reduce heat loss. They ensure the creation of a comfortable microclimate, heat preservation in houses and apartments..

Windows with energy-saving glass unit – what is it?

energy saving windows

The constructions are made of PVC double-glazed windows, which are endowed with unique modifications in production. This allows you to prevent the exchange of heat that goes from the room to the outside and back. Thanks to this technology, it is possible to maintain the same temperature indicators in rooms at any time of the year, using a minimum number of additional devices for this..

Various methods are known for improving the thermal insulation properties of window systems. This allows you to endow an ordinary glass unit with the properties of an economical product:

  • Metal oxide sputtering method. Often, when implementing the technology, tin or silver is used. Spraying is carried out not only on finished products, but also in the factory, even if this method is losing its popularity.
  • Spray film application method. The differences lie in the method of application, otherwise the method is identical to the previous one
  • A method of filling the space between glasses with gas. Argon is most often used in such works..

Regardless of the technology used, the result will be identical – a deterioration in the transmission capacity of the window structure is provided. This applies to temperature extremes, but also partially provides additional protection against UV rays..

Such systems are equally effective in winter and summer. In winter, the surface of the glass prevents heat from penetrating outside the house. In summer, the window prevents the penetration of street heat into the room (the need to use climatic technology is reduced). This allows you to save on resource consumption all year round. Therefore, not only standard designs have become popular, today energy-saving popular windows are often installed.

The difference between energy-saving designs from conventional ones

Despite the visual similarities, these are two different types of window structures with many differences. When buying, they are often confused, since a polyvinyl chloride profile is used in production. Windows have different parameters, differ by country of origin, manufacturing technology, quality control. The main principle in the manufacture of products is the application of special coatings, which gives them unique properties. They let heat from the street into the apartment and reflect it from the inside, thereby creating a reliable barrier that prevents heat from escaping outside the premises. The best energy saving windows keep the heated air inside the house or apartment.

Energy-saving windows – the pros

energy saving windows

All the advantages of energy-saving window systems have been thoroughly studied and tested in practice. As a result of experiments, it has been proven that heat loss through standard windows reaches 10-40%. The accuracy of the indicators is influenced by the area of ​​the structure, as well as the tightness. This problem can be solved with the help of heat-saving window systems, which have more advantages than disadvantages..


  • Reduction of total heat losses by 10%, protection against complete freezing.
  • The technology provides minimal energy losses through the window opening area (up to 40%).
  • Window systems protect the premises from overheating in summer, contributing to savings on the use of climate technology.
  • Insulating glass units provide protection against condensation.
  • Glasses reliably protect furniture in the room from fading under the influence of UV rays.
  • Energy-saving glasses provide improved sound insulation (especially models with argon or krypton).

Two-chamber energy-saving windows save up to 2,100 kW of electricity in a standard room with four window openings (8-10 square meters). This allows you to save on electric heating up to 75,000 rubles per heating season..

Thermal insulation properties

The advantage of innovative products is reflectivity. Standard glass quickly heats up and also quickly cools down, which is why in winter, part of the heat from the room goes to the street. Heating resources are wasted. Due to the special coating, the minimum radiation of heat outside the room is ensured, which allows you to maintain a high temperature inside the house. With these windows, creating comfortable temperatures becomes a simple task. Plus, your batteries won’t wear out..

In the summer, the room will be provided with a comfortable microclimate, without overheating. Despite the fact that ultraviolet rays will penetrate inside the room, the majority of the heat is reflected by the windows into the outside environment. This does not guarantee that the room will be cooler than outside the window, but the heating of the air in the room will be slower.


Models of window structures that contribute to the preservation of heat in the house in winter, do not load the wall ceiling and the structure of the house, can be used with any double-glazed windows.

Single-chamber models of energy-efficient windows will be even hotter than standard two-chamber systems. This provides an improvement in thermal insulation performance by more than 20%. Single-chamber profiles are much lighter than innovative counterparts with two or three chambers, but due to spraying, they are more reliable and economical in all characteristics. At the same time, two-chamber profiles are often not installed in “light” wall ceilings.

Despite the low weight of such a window, its energy-saving properties remain as high as possible. Film application or gas filling is possible in relation to all types of glass units.

No condensation

Condensation occurs due to temperature changes in the house and outside in cold weather. Standard window systems cool quickly and when they encounter warm air, condensation forms on their surface. Also, water droplets on the glass may appear due to the high level of humidity. Heat-saving systems do not freeze in winter, therefore they prevent the problem.

Burnout protection

Too bright natural light negatively affects objects in the room, from furniture and paintings to flowers. In many museums, exhibits are stored in rooms without window openings, under the influence of special lamps. The reflective spray effect reduces the illumination of the room. For a person, such changes will be invisible, but things in the room will retain their natural appearance for much longer..

Energy saving windows – cons

Like any other constructions, heat-saving windows also have disadvantages:

  • High cost when compared to standard systems.
  • When I-glass is used, oxidation processes in the upper layer are possible due to the leakage of the glass unit).
  • Spraying on energy-saving windows reduces the light transmittance of the product.
  • Before installing PVC windows, you need to analyze the house, weigh all the pros and cons.
  • You can install heat-saving structures in any room.


Sputtered structures are likely to replace vacuum glass units, which retain heat well and are distinguished by sound-absorbing properties. The products have been in use for a long time. But if we talk about mass use, then most likely this technology will not be applied everywhere in the near future. Vacuum structures are expensive and difficult to manufacture. The technology for the production of energy-saving windows is constantly being improved, and such windows can be afforded by the average residents of Moscow and other cities of Russia..

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