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PVC door & windows
High-class details



ARTI s.a.s. is member of the Association that protects “Made in Italy” windows.
13 May 2014 is a milestone for ANFIT: after 3 years from its establishment, during the first public Members’ Meeting held in Bologna, the results of three important projects were shown; they have been accomplished thanks to the work carried out by the Board of Directors during the last year:
- ANFIT Energy Label
- ANFIT Quality Brand
- ANFIT Manual on Installation
These three topics seem different but they are closely connected and represent the soul of the Association, which was established to promote quality, safety of use of doors & windows and to guarantee that they are manufactured in Italy.
ANFIT Energy Label can only be used by those companies that will undergo ANFIT Quality Brand achievement procedure: a third-party body appointed by ANFIT Board of Directors will monitor and guarantee quality, safety of use and that they are manufactured in Italy.
The Label will, indeed, specify where doors and windows are manufactured.
The Energy Label will be accompanied by a “Certificate of Origin” that will indicate all order details in order to guarantee where doors and windows come from: this will also serve as a guarantee in case of ordinary or extraordinary maintenance of doors and windows.
ANFIT Energy Label is a voluntary procedure and is part of Eco Design European Directive, enacted by the European Commission as part of the measures to carry out in order to achieve energy saving goals: it will become mandatory in 2017 as confirmed by Eurowindoor (the European Association of doors and windows manufacturers).

ANFIT is in the Work Group that, coordinated by ENEA and with other industry associations, is carrying out the procedure for the creation of the National Energy Label, which is pending approval by the relevant Ministry.
Since the approval of this important trade instrument, already used in Italy by Eastern European competitors, is still pending, ANFIT has opted for the voluntary procedure, while waiting for the enactment of the national Label.

Which values and regulations is this procedure based on?
The main aim of the Energy Label is to guarantee that any installed door or window has the best energy performance in winter as well as in summer.

The Presidential Decree no. 412/93 divides Italy into 6 climate zones identified by letters from A to F.

Climate zones specify when heating is turned on; degree days establish Italian climate zones according to external air trends in winter: if you know the thermal transmittance of the door/window by the value U = … W/m2K of the door/window (where the lower is the U value, the lower is the heat loss, thus higher is energy saving), the size and the solar factor “g” of glass, you can determine the energy efficiency classes for a summer/winter balance. (The solar factor “g” of glass indicates the percentage of free solar energy entering and heating a room against the total incident energy). So, if you know the thermal transmittance of the door/window, you can determine that in zones E and F, for example, where the consumption of the heating plant is relevant due to the long winter months, the free solar energy is very little, whereas it is higher in the zones A and B because the free solar energy heats the house in winter thanks to the “transparency” of glass; in the colder zones, triple-glazed windows are often used as they offer excellent insulation, but since they are darker they produce the opposite effect in that they do not let (free) heat to enter. In the summer, more “transparent” glass will have to be more adequately protected by proper shading systems to avoid room overheating and thus using air conditioning.

These parameters make a complex situation easy to understand. The climate zone, the degree days, heating days, the daily solar gain, the area of the glazed pane and its solar factor “g” are used to calculate the performance classes that doors and windows will have to have in summer and in winter.

The calculation of the energy efficiency class referring to summer considers the heat loss of glazed panes (glazed area x solar factor) and the solar contribution in summer (365 – heating days - x average solar contribution). The solar gain is calculated by multiplying the heat loss of glazed panes by the solar contribution.
The result is divided by the degree days and the glazed area: the higher the number of the degree days, the lower the impact of the solar gain.
The result is used to determine the Energy Label class.
The method is to be considered valid since, as regards summer, the main element is the glazed surface and thus its shading.

The calculation of the energy efficiency class referring to winter takes into consideration only the thermal transmittance «U» of the window. The solar gain is not taken into consideration in the calculation, because it is less significant in winter, and it would only improve performance.

The performance limits for the calculation of summer classes have been identified considering a double window measuring 1200X1500, installed in an E climate zone, Uw 1,50 W/m2K, solar factor “g” from 20% to 80% and the minimum values of climate zones as per Presidential Decree no. 412/93.

The reference value was the solar factor “g” equal to 50% because this limit is set for shutters as provided for by Legislative Decree 311 and as amended, under which the use of selective glazing is mandatory.
The limits for the calculation of winter classes have been identified by the Ministerial Decree dated 28/12/2012, the “Thermal Account”, which comprises the table of maximum limits of transparent closings.
Table 10 – Transparent closings: maximum limit values of thermal transmittance

[Table 1 – Appendix I – Ministerial Decree 28.12.12]

Type of action

Technological threshold technical requirements

d) Replacement of transparent closings including frames if installed together with thermostatic temperature control systems or thermostatic valves or if such systems were already installed at the time of action.

Climate zone A


Climate zone B


Climate zone C


Climate zone D


Climate zone E


Climate zone F


These values have been taken as reference for “A” energy efficiency class in the different climate zones.
Two more classes have been added “A+” e “A++”, as an incentive for the almost zero-consumption buildings, as provided for by the climate and energy package 20 20 20.

ANFIT Energy Label is thus a fundamental tool to make the difference between national products and imported products since it takes into consideration all the parameters that characterize the Italian territory and enables doors and windows manufacturers to suggest the best technical solution to their clients.
With the adoption of the ANFIT Manual of Installation, windows and doors manufacturers will have a complete package of trade tools, an added value to its offer.

65% tax allowance

The Council of Ministers approves the Stability Law and for 2014 the Tax Credit for energy efficiency will not change.
The percentage of the tax credit is still 65% and the percentage on renovation is confirmed at 50%.
For further information please contact us at info@arti-infissi.com and 0376 662346.