The benefits of BIM are discussed at almost all the conferences concerning the construction industry. Better quality project documentation is one of the most often referred assets of projects modelled in BIM. Unfortunately, it is not clear whether this benefit was realised in the projects or not. So, there raise following questions:

• How exactly was the declared better quality measured?
• What exactly is meant by the better quality documentation in practise?
• How can a contracting authority assess the quality of the project data processed by BIM models?

This article will try to answer all these questions and introduce the reader into the elementary principles of the quality measurability of the project information.

The article is intended for all clients (contracting authorities) who would like to choose a quality BIM contractor for their future project. It is based on the experience of implemented tenders (small-scale public contracts) and procurement procedures pursuant to Act No. 134/2016 Coll. on Public Procurement, as amended (“PP”). The article is an introduction to the system of qualitatively oriented selection of the BIM model contractor and related outputs – i.e. 2D drawing, quantity take-off, etc. This article applies to the Czech law.

The author points out the potential for savings in heating, etc. in public buildings and the potential dangers arising from inappropriately chosen scenarios. The risk factor is in particular the “lock-in effect”, which causes the failure to use all the possibilities to reduce the energy consumption that exists.

This is a case study of a multifamily residential building that has been environmentally assessed in terms of greenhouse gas (GHG) production using a simplified life cycle assessment (LCA) method. The results of total GHG emissions were compared to the emission limit value, which was set based on the climate objectives of the Paris Agreement and the scientific report The Emissions Gap Report. In response to the non-compliance with the emission limit, a number of emission-saving measures have been proposed and have been suitably designed into variants meeting the emission requirement.

This is a case study of a multifamily residential building that has been environmentally assessed in terms of greenhouse gas (GHG) production using a simplified life cycle assessment (LCA) method. The results of total GHG emissions were compared to the emission limit value, which was set based on the climate objectives of the Paris Agreement and the scientific report The Emissions Gap Report. In response to the non-compliance with the emission limit, a number of emission-saving measures have been proposed and have been suitably designed into variants meeting the emission requirement.

The risk assessment of water systems is implemented and carried out in more than ten European and a number of non-European countries. The main expected benefits of risk assessment are improving water quality, reducing the number and consequence of accidents, improving water resources protection, reducing acute diseases in the customer population, improving operational monitoring, better understanding of the entire supply system, reducing costs of remedies, operator and more. The disadvantage of carrying out a risk analysis for operators is, above all, a higher administrative burden and the costs of introducing a risk assessment.

Any roof likely to fall from a height shall be fitted with a handrail or restraint system as appropriate for the intended operation. Protection of persons against falls from a height must be addressed already during construction. Therefore, Act No. 309/2006 Coll. in its current wording, it specifies the work of the contractor and sets out its obligations. In addition to this Act updated in 2016, it is of course necessary to take into account other legislative requirements in the construction process. This implies many responsibilities of individual construction participants, which will be discussed in this paper.

In this article, we focus on fundamental element of primary protection – detection devices for registering the rise of hazardous concentrations of gases and vapors. We have chosen and described for each type of device and kind of detected gas basic tests that are necessary for ensuring their correct and reliable function.

The article briefly introduces basic technical terminology, errors and computational algorithms for estimating uncertainty of type A, type B, combined and extended uncertainty of test results and that the test management performs the tasks specified in the standard ČSN EN ISO / IEC 17025.

In recent years, we have seen a steady increase in the amount of data that is measured and recorded by measurement and control systems. Typically, these are hundreds to tens of thousands of readings per building. The question arises as to whether these data are properly utilized, extracted. The aim of the paper is to present the possibilities provided by current technologies and analytical software tools for evaluating data measurements related to the operation of heating systems.

The article describes all significant changes in the field of designing and implementing radon protective and remedial measures introduced by the revised version of ČSN 73 0601, which came into force on 1.10.2019. A new way of selecting measures according to the building type and new concept of designing according to the design values of input parameters are introduced. A new methodology for designing radon-proof insulations is described in detail. According to this methodology, only insulation with a radon resistance greater than the prescribed minimum radon resistance can be used for building protection.

The paper shows the difference in the economic parameters of the use of heat pumps in multi-dwelling buildings between the case of reconstruction and new building. The examples show the balances of two specific studies prepared in 2017 and 2018 for customers. While heat pumps in apartment building reconstructions can be advantageous only at relatively high energy prices above 700 CZK / GJ, in new buildings they can be an economical source of heat.

Increasing the thermal insulation properties of walls, roofs, floors and windows has a positive effect on reducing heat loss and energy need for heating. However, when assessing the energy need for cooling in buildings with conditioned indoor environment, this tendency to increase the thermal insulation capability may lead to an increase the energy need for cooling, when measures to reduce heat gains by transparent structures are not applied.

In the contribution, we are focused on the quality of the heat-moisture microclimate and the aspects that affect it. We chose one office room in the building of the Research Center of the University of Žilina (UNIZA), oriented to the west. The subject of the measurements were all physical components of the indoor environment, the effect of solar radiation through window constructions and floor temperatures using low-temperature radiant floor heating. The contribution describes measuring methods, results of measurements and related partial conclusions for cold climatic conditions of the year.