TZB-info is an Internet resource specialising in information on construction, energy savings, and the related fields collectively referred to as mechanical and electrical systems usually known as building services (in Czech abbreviated as TZB). Its primary focus lies within the construction of buildings and energy issues related thereto. Whether you're looking for heating, electricity, heat loss reduction or building efficiency, the portal offers up-to-date information on the developments in those fields every day. The information presented by TZB-info is carefully selected and edited, serving a diverse audience of professionals ranging from designers to installers but also the general public. TZB-info records 750,000 visits every month. read whole text
Heating5.1.2026 | Ing. Petr Michal, IVT Tepelná čerpadla s.r.o.
Heating29.12.2025 | Ing. Petr Michal, IVT Tepelná čerpadla s.r.o.
Heating23.12.2025 | Ing. Zuzana Veverková, Ph.D., ČVUT v Praze, Fakulta stavební, Katedra technických zařízení budovThe desire to ensure thermal comfort for humans has probably existed since the dawn of time. The design and operation of systems ensuring thermal comfort in buildings has evolved and changed significantly in recent decades with the aim of providing maximum comfort. The invention of air conditioning by Willis Carrier in 1902 marked the beginning of a technologically controlled approach to indoor environment design in the following decades. The design of indoor environment parameters thus became essentially dictated by what was and is technically feasible. Among other things, indoor temperatures were set to ensure overall thermal comfort. Today, temperatures in buildings are usually set to provide thermal comfort for occupants by keeping them within the thermoneutral range.
Heating22.12.2025 | Ing. Josef Hodboď, TZB-info, redakce
Ventilating and Air-Conditioning12.11.2024 | Ing. Pavla Skalická, Luftuj s.r.o., časopis VVI, 2/2024 | Vytápění větrání instalace, 2/2024Practical experience with the cleanability of parts of the forced ventilation system with heat recovery in family houses. The need for cleaning and design and assembly deficiencies that lead to difficult maintenance. Some policies to make service easier.
Water and Drainage4.12.2025 | Ing. Ondřej Doležal, energetický specialista podle §10 odst.1 písm. a) zákona č. 406/2000 Sb.
Water and Drainage6.11.2025 | prof. Ing. Jiří Wanner, DrSc., Vysoká škola chemicko-technologická v Praze (VŠCHT)
Water and Drainage9.10.2025 | Ing. Štěpán Zrostlík, Ph.D., ČVUT v Praze a Vodohospodářský rozvoj a výstavba a.s.
Renewable Energy21.11.2025 | prof. Ing. Tomáš Matuška, Ph.D., ČVUT v Praze, Univerzitní centrum energeticky efektivních budov
Electrical Engineering25.9.2025 | doc. Ing. Antonín Platil, Ph.D., ČVUT v Praze, Fakulta elektrotechnická (FEL)In this two-part series, we focus on the advanced standard for communication between automation devices in buildings. The previous part described the supported networks and object model. This second and final part describes the service system and tools for ensuring the interoperability of devices from different manufacturers.
Electrical Engineering18.9.2025 | doc. Ing. Antonín Platil, Ph.D., ČVUT v Praze, Fakulta elektrotechnická (FEL)Building Automation and Control network (BACnet) is network protocol specifically designed for automation and control of technologies in buildings. Typical applications include heating, ventilation, air conditioning, lighting, access control and fire detection. It provides standardized framework for organizing and sharing information between networked control devices [1, 2]. Interoperability is provided through object model of information items and their properties and associated services. Flexibility is provided by a range of supported networking options from serial line to Ethernet and internet connection. However, BACnet does not guarantee interchangeability of products from various vendors and every controller or other product may require vendor-specific programming and configuration tools.
Electrical Engineering5.9.2025 | prof. Ing. Dušan Petráš, PhD., Stavebná fakulta STU Bratislava Katedra technického zariadenia budovHeat supply is a society-wide phenomenon that affects everyone. In other words, it is not just a matter of technical solutions, energy intensity, and environmental safety, but also of economic efficiency, both for individuals and legal entities. It is therefore important to optimize these processes related to the production, accumulation, distribution, and transfer of heat, for which the use of artificial intelligence is also appropriate.
Electrical Engineering25.2.2025 | Ing. Erika Langerová, ČVUT v Praze, Univerzitní centrum energeticky efektivních budov
Elevators24.8.2015 | Ing. Bohuslav Kratěna, Unie výtahového průmyslu České republiky
Elevators20.7.2015 | Vladimír Hulena, pověřený HK ČR k provádění audituCSN 27 4002 2014 Safety rules for lifts - Operation and service of lifts has introduced a new term by an authorized service company. It is the transparency of professional competence companies in servicing elevators, to owners / operators can better decide with whom an agreement that service because it has a major impact on their responsibility to ensure the safe operation of elevators. Therefore, for this situation was the subject of speculation, it was decided to examine service firms independent commissioners, contracted authorizing body, in this case, the Chamber of Commerce, which, when positive evaluation subsequently issue a certificate of authorization, and the company name may Authorized service company use.
Elevators28.7.2014 | Ing. Jan Dvořák, Ing. Bohuslav Kratěna, Vladimír HulenaUnion for Elevator Industry summarizes the most important news in the standards and audits, as presented at the seminar Elevators 2014. This includes controversy with a new concept of authorized service company that has been published on our portal in advance.
Elevators21.7.2014 | plk. Ing. Zdeněk Hošek, Ph.D., Ministerstvo vnitra - generální ředitelství Hasičského záchranného sboru ČRElevators belong to a very important building services and technologies. For these reasons, they need to pay attention not only in terms of proper technical implementation, but also in terms of fire safety. In particular, fire and evacuation lifts, which are also very important fire safety devices must also meet the stringent technical requirements of fire protection.
Facility management2.1.2026 | doc. Ing. Michal Kabrhel, Ph.D., ČVUT v Praze, Fakulta stavební, katedra TZB
Facility management17.12.2025 | prof. Ing. Daniel Kalús, PhD., Ing. Mária Füri, PhD., Ing. Veronika Mučková
Facility management13.10.2025 | Vladimír Baletka, jednatel společnosti eFAMECO s.r.o.The article focuses on the safe operation of Mobile Elevating Work Platforms (MEWPs) in compliance with current Czech legislation and technical standards. It highlights common mistakes observed in practice, the responsibilities of operators and employers, requirements for documentation, inspections, and operator training. Special attention is given to the use of personal fall protection equipment, the platform work system, and legal obligations under Act No. 250/2021 Coll., Government Decree No. 193/2022 Coll., Government Decree No. 362/2005 Coll., and EN 280. The text provides practical recommendations to ensure workplace safety and legal compliance for MEWP operators.
Facility management30.6.2025 | Vladimír Baletka, jednatel společnosti eFAMECO s.r.o.The article “Safety of Rack Systems in Warehouses” deals with key aspects of safety when using rack systems in warehouses. It emphasizes the importance of regular inspections and maintenance of rack structures to prevent accidents and injuries. Furthermore, it addresses legislative requirements and standards that must be followed to ensure the safety of workers and stored materials. The article also provides practical advice and recommendations for the proper use of rack systems, including correct loading and organization of stored items.
RECENT REVIEWED EDITORIAL RESEARCH PAPERS IN THE FIELD OF BUILDING SERVICES ENGINEERING
Heating | Ventilating and Air-Conditioning | Water and Drainage | Renewable Energy | Electrical Engineering | Energetics
Shell Construction30.11.2025 | Ing. Veronika Sojková, Ph.D., ČVUT v Praze, Fakulta stavebníRecycling materials is an effective way to reduce the consumption of primary resources in construction. However, challenges arise when integrating recycled materials into construction products, primarily due to the variability of their quality, which can impact production processes. This paper explores the balance between recycling and decarbonization goals in the manufacturing of ceramic materials, examining both legislative pressures and environmental objectives. The paper emphasizes the need for optimized recycling strategies and innovative solutions that align with circular economy principles to meet sustainability targets in construction.
Shell Construction26.11.2025 | Ing. Pavlína Lakatosová, Ph.D., Ing. Tomáš Oupic Svoboda, Ing. Jaromír Kabeláč, Ph.D.
Shell Construction23.11.2025 | doc. Ing. Václav Kupilík, CSc., ČVUT v Praze, Fakulta stavebníVegetation has a positive effect on building structures in most cases (green roofs, green facades, etc.), but it can also have negative effects, as evidenced by the following article.
Insulation, Roofs, Facades8.12.2025 | Ing. Štěpán Vrhel, Technický a zkušební ústav stavební Praha (TZÚS)This article outlines the assessment and market placement of External Thermal Insulation Composite Systems (ETICS) in the Czech Republic and the EU. It compares national (STO) and European (ETA/EAD) procedures, focusing on manufacturers’ duties in quality management and conformity assessment. Key changes include the new EAD 040083-01-0404, the phase-out of ETAG 004, and the forthcoming harmonized standard EN 17237. Selected test methods—hygrothermal performance, water absorption, mechanical resistance, adhesion, and pull-through resistance of anchors are presented. The paper describes the role of certification bodies.
Insulation, Roofs, Facades24.11.2025 | Ing. Pavel Šťastný, CSc., autorizovaný inženýrThis paper deals with methods used for estimation of masonry moisture contens as part of building technical survey. General description comes from WTA 4-11 Recomendation and Czech standard CSN P 730610 “Waterproofing of buildings. Rehabilitation of damp masonry”. Different practise, used during survey, caused by unspecified procedures, is discussed. Also misinterpretation of measured values, caused by waterproofing and water repelent layers on masonry is being shown.
Insulation, Roofs, Facades27.10.2025 | Ing. Alžbeta Danková, prof. Ing. Boris Bielek, PhD., Mgr. Daniel SzabóThis study applies dynamic simulation methods for the design of energy-efficient buildings with double transparent facades. The aim is to comprehensively quantify the impact of double transparent facades on the internal environment of buildings in terms of heating and cooling. The article compares the thermal comfort and energy consumption of two variants – with and without exterior blinds. The simulation analyzes parameters such as air temperature, relative humidity, lighting intensity, and energy consumption. Emphasis is placed on identifying the potential for energy savings associated with shading. The analysis also addresses the sensitivity of the results to changes in input parameters. This study provides valuable data for our interdisciplinary research.
Insulation, Roofs, Facades2.9.2025 | Ing. Veronika Chrástová, prof. Ing. Jaromír Říha, CSc.The Dlouhé stráně pumped storage power plant is located in the heart of the Jeseníky Mountains near the state border with Poland. In recent decades, the asphalt concrete shell of the upper reservoir has been struggling with complications in the form of local point failures, which manifest themselves as blisters on the surface of the shell with a diameter of up to 30 cm. Although the asphalt concrete shell was reconstructed in 2007, the blister problems reappeared a few years later and have been repaired every summer since then. An insufficient drainage system may be closely related to the problems on the surface of the AB shell. The limited possibilities for monitoring leaks along the route of the upper reservoir drainage system do not meet the requirements for accurate and local monitoring of leaks and, possibly, for detecting increased leaks that may indicate a dam breach. For these reasons, a proposal was drawn up for the reconstruction of the asphalt concrete shell together with the drainage system of the reservoir bottom.
Windows, Doors23.12.2024 | Ing. Jakub Mareš, Ing. Yasmina Boutar, Ph.D., prof. Ing. Martina Eliášová, CSc.This paper presents the results of an experimental investigation into fully transparent bonded joints for load-bearing glass structures. The research specifically focused on the surface properties of glass that affect the load-bearing capacity of the joints, such as surface energy, wettability, and roughness. It also discusses the differences between the tin and air sides of the glass sheets.
The findings are supported by tests conducted at the Faculty of Civil Engineering at CTU between 2021 and 2023. Tensile and dynamic tests of the selected adhesive LOCTITE
® EA 9455 as well as shear tests of single-shear glass-to-glass joints, were evaluated, with a focus on the load-bearing capacity of the joints at elevated temperatures.
The paper concludes with a summary of the results and suggests their implications for engineering practice.
Windows, Doors16.9.2024 | Ing. Zuzana Rácová, Ph.D., Ing. Aneta Libecajtová, Ph.D.The article focused on the issue of installing door panels in interior vertical load-bearing and partition structures. The paper presents selected types of door panels primarily used in apartments and family houses, describes the principles of their installation, and their depiction in drawing documentation in accordance with the ČSN 01 3420 standard for drawing construction parts. It is necessary to correctly and clearly apply the rules of the standard to the depiction of currently used door panels.
Windows, Doors8.4.2024 | Ing. Zuzana Rácová, Ph.D., Ing. Aneta Libecajtová, Ph.D.The article is focused on the issue of installing windows in external walls and their drawing in accordance with the standard ČSN 01 3420 Construction drawings - Presentation of general arrangement drawings. The paper highlights the obsolescence of previous solutions in light of current requirements for the energy efficiency of buildings and technological advancements in construction. Specifically, it is focused on the principles of installing opening fillings, including thermal and technical requirements, and technological aspects. It is shown that incorporating new technological processes and energy efficiency requirements necessitates reflecting these changes in the project documentation as well. Furthermore, the article addresses the depiction of current solutions in construction practice in accordance with the ČSN 01 3420 standard at scales of 1:50 and 1:20.
Windows, Doors20.3.2023 | Ing. Lucie Kudrnáčová, Ph.D, ČVUT v Praze, Kloknerův ústav, Oddělení stavebních materiálůThe paper deals with the comparison of the thermal properties of jamb for different types of windows. In the case of reconstruction, it is often necessary to preserve the original double- windows or to use modern materials due to the thermal solution of the building. Modern constructions mean the use of double or single windows with thermal-insulating glazing. These changes in the construction of the window have an effect on the thermal processes on the structure. One of the important parameters for the assessment of the building structure is the assessment of the internal surface temperature of the building structure. This article shows the difference in finishes and heat flows to remove different types of windows. The reference window for comparison is the original double history window. The results were found in a model environment in 2D software.
Floors, Partition Walls, Surfaces15.12.2025 | Ing. Silvestr Vasas, Ing. Tomáš Melichar, Ph.D., Ing. Amos Dufka, Ph.D., prof. Ing. Pavel Schmid, Ph.D., doc. Ing. Jiří Bydžovský, CSc.The article presents research focused on a detailed analysis of cement-bonded particle boards modified with waste dust. This dust is produced during the grinding and cutting of cement-bonded particle boards. The emphasis was mainly placed on the behavior of boards with a modified composition with regard to their hygroscopicity and useful properties. The properties of three types of boards were analyzed – reference (Portland and blended cement) and dust-modified (filler and matrix – based on Portland and blended cement, substitution with waste dust in an amount of 8%). The boards were exposed to an environment with variable relative humidity (0% to 96%), with a gradient of increase and decrease of 10%. The output of this measurement is sorption curves. Subsequently, the mechanical properties (strength characteristics and modulus of elasticity) were tested on the test specimens. The obtained sorption isotherms confirmed the different behavior of individual composites in response to changes in ambient relative humidity. The results indicate that the composition of the mixture has a significant influence not only on sorption processes, but also on the stability of the wood filler itself, specifically spruce chips contained in the material. However, the behavior of the analyzed types of boards in terms of hygroscopicity is very similar. An increase in strength and modulus of elasticity was observed in all tested board variants. This finding is a positive sign for the further use of stabilized alternative raw materials in cement-bonded particle boards. The use of waste dust has significant potential to positively impact the environment, i.e., by consuming waste that would otherwise be a burden on the environment.
Floors, Partition Walls, Surfaces18.11.2025 | Ing. Petr Tůma, Ph.D., autorizovaný inženýrIn 2025, the ČSN 74 4505 standard was updated. The article presents the main changes compared to the previous version published in 2012.
Floors, Partition Walls, Surfaces4.9.2025 | Bc. Tomáš Macháček, ČVUT v Praze, Fakulta stavebníThis article addresses the issue of the effect of moisture on the characteristic manifestations of plasterboard. It first summarizes the processes of plasterboard in fire. It then highlights the influence of fire-fighting water. Second, it describes an experiment carried out in which fire-degraded plasterboard samples were exposed to water. Their subsequent natural drying was also measured.
Low Energy Buildings21.4.2025 | Ing. Veronika Dokoupilová, doc. Ing. Petr Horák, Ph.D.Preparations for the implementation of the EPBD IV directive, i.e. the transition to nearly zero-emission buildings, into Czech legislation are underway. The results of the study indicate options leading to compliance with EPBD IV in an apartment building.
Low Energy Buildings6.2.2023 | Ing. Kateřina Klepačová, Ing. Magdaléna Novotná, Ph.D., Ing. Martin Volf, Ph.D., Ing. Jakub Diviš, Ph.D., Ing. Jan Růžička, Ph.D.
Low Energy Buildings30.4.2021 | Ing. Zuzana Mrňová, VUT FAST Brno, Ústav stavební ekonomiky a řízeníA responsible approach to the environment is not only related to corporate ecology, but is also increasingly reflected in the design and construction of buildings, which is closely related to the concept of sustainable construction of buildings. With the development of sustainable construction, the need arose to evaluate buildings and their impact on the environment. For this reason, environmental certifications of buildings have been developed, which assess how a building affects its surroundings during its life cycle.
The aim of this article is to find out which environmental certifications exist in the world and which of them are most often used in the Czech Republic. Finally, the certifications are compared and their main differences are described.
Low Energy Buildings8.2.2021 | prof. Ing. Jan Tywoniak, CSc., ČVUT v Praze | Dřevo&Stavby Profispeciál 2020
Wooden Buildings22.12.2025 | Ing. Lukáš Velebil, Ph.D., Ing. Šimon Matějka, doc. Ing. Petr Kuklík, CSc., Ing. Jan Pošta, Ph.D., Ing. Martin Hataj, Ph.D., Ing. Jan JochmanIn this paper, the authors present an experimental analysis focused on the behavior of reinforced walls in multi-story cross-laminated timber (CLT) buildings in relation to the stiffness of the ceiling structure. As part of the experimental analysis, a test was performed on a set of structural-sized bracing walls, focusing on panel joints and anchoring, as well as a series of additional tests on shear angles and tension anchors. The analysis shows that the load on the lower wall panel from the upper panel is not uniform. This contradicts classical models, which assume a uniform load on the upper edge of the lower panel along its entire length. The flexibility of the ceiling panel also affects the load transferred to the tension anchors.
Wooden Buildings14.8.2025 | Ing. Jitka Beránková, Ph.D., Ing. Barbora Lošťáková, Ing. Antonín Novotný MBA
Wooden Buildings14.7.2025 | doc. Ing. Petr Kuklík, CSc., Ing. arch. Bc. Anna GregorováCurrently, we are increasingly confronted with demands for the construction of multi-story wooden structures, where wood and wood-based materials would be predominantly used. This is due to new wood-based products offering this alternative construction method with significant ecological benefits. This is also made possible by the deepening knowledge about the design of structural systems for multi-story wooden buildings, particularly in terms of their load-bearing capacity, stiffness, and fire resistance.
Wooden Buildings9.6.2025 | doc. Ing. Petr Kuklík, CSc., Ing. arch. Bc. Anna GregorováAlthough the term wooden construction is not introduced in our legal regulations, we commonly understand this term as constructions in which wood and wood-based products are the main material used. However, the proportion of wood and wood-based products is not defined and depends on the construction system used. Wooden constructions are currently the subject of growing interest among developers, architects, civil engineers and the public. This is mainly due to the fact that they offer an alternative method of building construction with great ecological benefits. Their advantage is also the speed of construction and usually low demands on the equipment of the construction site. Technical standards are important for their design and implementation.
Building Regeneration28.12.2025 | PhDr. Martin Novotný, Ph.D., Ing. Zdeněk Vejpustek, Ph.D., doc. Ing. Ivana Žabičková, CSc., Ing. Jan Müller, Ph.D., Ing. arch. Roman BolcekBuilding with earth is gaining increasing attention, partly because there are many high-quality historical and contemporary earthen buildings in our country. Documenting the extent of the earthen building heritage has the potential to strengthen the perception of earthen construction as a valuable part of cultural heritage and as a promising tool for sustainable construction. This article presents the research framework, methodology, and starting points for the upcoming map output Historical Earthen Buildings in the Czech Republic, which aims to systematically map the occurrence, frequency, and typology of these structures.
Building Regeneration20.10.2024 | Ing. Jan Zima, Rekonstrukce památkových objektů-atelier statiky spol. s r.o.
Building Regeneration26.8.2024 | Mgr. Kateřina Kovářová MBA, Ph.D,, Ing. Eva Matoušková, Ph.D.In our practice, we often face the question of building stone provenance on historic buildings. However, methods providing relevant answers to this question are mostly of a destructive character requiring sampling. Therefore, our research has focused on the use of reflectance spectrometry, which is a very promising and effective non-destructive method. This paper discusses the basic principles and possibilities of this method with regard to its application to historic buildings and decorative stone.
Building Regeneration8.4.2024 | Ing. Denisa Boháčová, Ph.D., prof. Ing. Pavel Kuklík, CSc.The paper presents the original condition of the castle in Nemyšl near Tábor together with the subsequent process of its rehabilitation. This requires a careful evaluation of its condition, determination of the remediation procedure along with condition monitoring to ensure safety on the construction site. To accomplish this task - the abbreviation SHM (Structural Health Monitoring) is used abroad - the available possibilities of current information technologies have been used.
Building Physics5.11.2025 | doc. Ing. Jan Kaňka, Ph.D., člen TNK 76 Osvětlení, ČKAIT PrahaThe nature of hygienic limits is different from technical limits. Little awareness of this property has led to misunderstandings in the field of housing construction when creating binding regulations and when applying them. As a result of Act 258/2000 Sb. [1], no one has the right to control, co-create and defend the environmental conditions in apartments from a health perspective.
Building Physics3.11.2025 | Ing. Zuzana Dická, prof. Ing. Milan Ostrý, Ph.D., Ing. Sylva Bantová, Ph.D, doc. Ing. Erika Dolníková, PhD., prof. Ing. Dušan Katunský, CSc.This review describes Phase Change Materials (PCMs) as an advanced solution for improving building energy efficiency and thermal comfort. It synthesizes insights into their evolution, categorization, and practical construction applications. It discusses PCMs history, operational principles, diverse typologies, and classification, including composite PCMs. It elucidates specific building applications, illustrating their integration based on recent research. The aim is to provide an overview of PCMs development and underscore their significance as a sustainable instrument for mitigating energy operating costs and elevating thermal comfort in contemporary construction. Concurrently, it delineates current obstacles and proposes strategic research directions, focusing on thermophysical property optimization, economic viability, and ecological sustainability.
Building Physics13.10.2025 | doc. Ing. Peter Buday, PhD., doc. Ing. Rastislav Ingeli, PhD.The currently valid standard STN 73 0540-2/Z1+Z2, 2019 [1] defines thermal requirements not only for external envelope structures, but also for internal partition structures in residential buildings. These are defined by the thermal conductivity coefficient
U (previously referred to as thermal resistance
R) depending on the temperature difference between the rooms separated by these wall and ceiling structures. Based on a specific apartment in a prefabricated ZT building system, this paper quantifies the effect of this thermal insulation of partition structures (ceilings and walls) on the heat demand for heating (and thus its energy intensity) depending on the calculated temperature difference between the analyzed apartment and all neighboring apartments throughout the winter heating season.
Building Physics8.9.2025 | doc. Ing. Jan Kaňka, Ph.D., člen TNK 76 Osvětlení, ČKAIT PrahaThe article discusses the impact of the abolition of the requirement for sunlight in apartments in binding regulations on public health. It notes the fact that as a result of Act 258/2000 Coll., no one has the right to control, co-create and defend the environmental conditions in apartments from a health perspective.
RECENT REVIEWED EDITORIAL RESEARCH PAPERS IN THE FIELD OF CONSTRUCTION
Shell Construction | Insulation, Roofs, Facades | Windows, Doors | Floors, Partition Walls, Surfaces | Low Energy Buildings | Wooden Buildings | Building Regeneration | Building Physics