Passive construction is gaining more and more popularity both in Poland and throughout Europe. This type of construction is a very advanced form of energy-saving construction. This type of construction owes its popularity to, among others, growing environmental awareness among both individual clients and commercial investors. Increasing heating costs and other operating expenses have an impact on the growing ecological awareness. Building a house in the passive system is not a very simple investment, because it requires the use of the highest quality building materials and the commissioning of work to qualified contractors. One of the important elements of passive construction are passive windows: Upvc windows.
Passive windows are windows that meet the requirements of passive construction. Passive construction is a type of construction that, due to high thermal insulation, can be heated by energy and heat sources previously overlooked. Such heat sources include solar radiation, or rather heat radiation of the sun, or heat that is emitted by residents and household appliances. The most important task of passive windows is to provide the building with high tightness and prevent the formation of thermal bridges.
A passive window should have a specific heat transfer coefficient for the entire window. This coefficient is marked with the symbol Uw and should be below 0.8 W / m2K. Such conditions may be met, among others, by windows with a three-rail package, which are manufactured in aluminum, wood-aluminum, wooden or plastic construction. Often these constructions include special polyurethane foam. Passive windows have a depth of 88 mm to 120 mm.
Passive windows made of PVC are the most popular. Windows made of plastic are characterized by a low price with similar thermal and acoustic parameters of the window. It is worth mentioning that the profile of passive windows made of PVC should be divided inside into at least six chambers, thanks to which, among others, such a structure can achieve such favorable thermal parameters. Passive windows are characterized by a very good heat transfer coefficient.
Types of passive windows
Among passive windows, PVC passive windows are the most popular. They owe their popularity to being the cheapest of all types of passive windows. In addition, they are easy to install, clean and operate. Energy-saving passive windows made of plastics must meet several important conditions. One of them is the appropriate heat transfer coefficient, which should be below 0.8 W / m2K.
Another condition that energy-saving windows made of plastic must meet to be classified as passive windows is the construction of the window sash frame. The profile of plastic passive windows should have a minimum of six internal chambers that provide excellent thermal and sound insulation of these windows. PVC passive windows should also have appropriate gaskets that also thermally insulate and protect against the ingress of moisture and water.
Passive windows can also be made of wood. The advantage of this type of windows is great aesthetics and elegance. Passive wooden windows should have a three-rail package with two chambers. The depth of wooden energy-saving windows that meet the conditions of passive construction should be in the range of 88 mm to 120 mm.
In addition to the depth and number of panes and inter-pane chambers, passive wooden windows should also have appropriate gaskets that guarantee thermal insulation, energy efficiency and protect against the penetration of window constructions and moisture and water rooms. They also usually have properties that effectively insulate street noise from outside the building.