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Influence of shading technology on interior temperature and environment


Calculation of the efficiency of the Climax shading technique on windows

Do you want to simply calculate what sun protection you will get with our products? Use a simple calculator to calculate the transmission of solar energy and light according to the type of shading in combination with specific glazing on the windows of your house or apartment.



Our products significantly protect the environment

At the request of the Association of Shading Technology Manufacturers, the company PRODIG - TCV prepared a study which clearly described the reduction of the heat load of a family house when using shading.


The study compared interior heating with and without shading technology. She also provided an estimate of the costs of implementing air conditioning, an estimate of energy savings in the operation of air conditioning and an estimate of CO2 emissions. In the study, the calculation of heat gains for one room in the house is performed and also for the whole building, a simulation of the heat load is performed with the evaluation of the costs of operation of the cooling equipment and possible savings.

It is a modern family house with two floors with a flat roof, the building does not have a basement. Perimeter walls are made of system wall formwork made of thermal insulation, cement fiber board. Monolithic reinforced concrete roof with polystyrene insulation. All constructions meet the requirements according to ČSN EN 73 0540.



By using shading elements with a reduction factor Fc = <0.08 , it is possible to achieve a state where there is no need to install cooling in order not to exceed the standard value of indoor temperature in summer, which is 27 ° C.


The above reduction factor corresponds, for example, to the following types of shielding:

  • light-colored external blinds
  • light or medium color external roller shutters
  • facade awnings with blackout fabric of light or medium color

Savings with shading technology


The purchase price of shading elements for the windows of 6 rooms of the family house is CZK 100,000. The estimated price of air conditioning equipment for a house without shading with an outdoor unit of 12.5 kW according to the price list prices of manufacturers is 270,000 CZK. The return on investment in the shading elements is immediate in this case.


The cost of operating air conditioning

In an average warm year, it is about 100 days, when we must use air conditioning to ensure a maximum of 27 ° C. On average, we pay about 5,000 CZK / year for operation + about 2,000 CZK for a complete air conditioning service.


Environmental impact

When installing air conditioning in a house with no shading elements, it is necessary to use a system with refrigerant. The use of these substances creates the potential for global warming. Each of these substances has its own global warming potential (GWP). It is the CO2 value that characterizes the possible influence in case the refrigerant escapes into the atmosphere. If we installed a system with an output of 10.0 kW and a refrigerant charge of 3.5 kg in the house, the effect of the accident would be the same as in the production of 7,308 kg of CO2. This environmental burden is eliminated when installing the shading.


The recommended type of external shading will reduce heat gains so that it is not necessary to install air conditioning in the house that was the subject of the study in order to maintain the maximum interior temperature in summer up to 27 ° C.



Jasenice 1253

755 01 Vsetín

Czech Republic

+420 731 661 058

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