Overview of the contents and recommendations to the appendix in a purchase contract and contract for work. The issue of windows and balconies – windows and doors - is very extensive and contains many requirements. This resulted in the manual “Technical conditions for the purchase and installation of windows”, which seeks a simple, yet all-encompassing for to describe the requirements for the windows, so less sophisticated techniques could apply to suppliers. The article is the introductory text of this guide, which is available for download. This is purely a technical manual that tries to cover all the usual cases of windows, requiring them, their evaluation, classification and their density. The manual does not replace or otherwise alter the forthcoming standard dealing with the requirements for windows and doors in buildings. The manual is completely independent and does not know about what is included the upcoming standard.

The article reacts on changes that were made in program "Zelená úsporám" in recent days. Previous article described how to reach required standards for successful subsidy application in two ways. Following text focuses on changes in this approach both from subsidy amount and possibility of subsidy itself viewpoints. In general, portfolio of potential subsidy applicants has been extended, but necessary quality of subsidized measures has been kept.

The examination method Blower-Door test (fan pressurisation method) is used for measurements of air permeability of buildings and is also used for leakage detection. The result of the measurement is air leakage rate at the pressure differential across the building envelope of 50 Pa. The article points out leaky details which often appear at constructions. The article shows the possibility of using infrared camera and anemometer for leakage detection.

The development of the implementation of open track diffusion is influenced by the availability of certain construction materials and it is also subject to the management of technological processes and the overcoming of ingrained stereotypes.