The low heat loss in family houses enables comfortable hot air heating with air-to-air heat pumps. The authors give an example of the conditions for obtaining a subsidy from the „Nová Zelená úsporám“ (Green to Savings) program. Achieving the highest category of the NZÚ subsidy is also realistic in the „new buildings“ category.

The pressure losses in the fittings are difficult to calculate in the design phase, as the key factor for them is the pressure losses, which is variable with respect to the type of fitting and its geometry. The possibility of obtaining an approximate value of the pressure loss coefficient is experimental measurements.

The minimum efficiency required for the efficient use of the heat exchanger in the equal pressure ventilation system of a family house is determined by the ratio of energy for fan operation and preheating to recovered energy, the balance in terms of energy and primary energy prices and economic return.

Development of the second generation of Eurocodes for climatic actions in the framework of the technical subcommittee CEN/TC250/SC1 is nearly finished. Revised Eurocodes should be more transparent, user-friendly and provide information about the basis of climatic actions and their effects on structures. National selection of the National Determined Parameters is expected to be given in the National Annexes including updated climatic maps.

The cause of the odor after the generational replacement of the gas boiler can be reduced air exchange in the room, improperly designed waste pipes, or even insufficient hygiene. The level of cleaning and hygiene is solved by the apartment user. Sufficient ventilation and treatment of the waste pipe, such as the installation of an aeration valve, should be designed by a person skilled in the art.

The paper focuses on the issue of one of the parameters of the indoor environment, which is the quality of indoor air. The new construction of an apartment building with controlled ventilation in the nZEB standard outlines the possible causes of perceived deteriorating air quality, but also the possible consequences associated with the construction of buildings with almost zero energy consumption in this area.

Highly efficient HEPA and ULPA filters are accumulative (absorb particulate particles) and are therefore not intended for regeneration, but must be disposed of in an environmentally friendly manner. Filters are classified as hazardous waste and must be handled as such.

The subject of the research is a ventilation unit with a heat pump providing vacuum ventilation in a specific family house. The year-round energy balance of the operation was prepared from the obtained parameters. For a total heat loss of 5 kW, the seasonal heating factor SPF of the entire system was evaluated at the level of 2.5.

The authors describe the legislative requirements for ventilation and their possible technical solution. The mathematical model of the family house is used to evaluate the technical solutions of ventilation according to energy intensity. It is based on the economic evaluation of variants.

The authors describe legislative requirements for ventilation and their possible technical solution. The mathematical model of the family house is used to evaluate the technical solutions of ventilation according to energy intensity. It is based on the economic evaluation of variants.

Due to long term cooling of the ice ring it may happen that subsoil was affected, bulged and consequently nonreturnable destroyed in case the structure was built on high-risk soil. Sub-soil heating system was tended to be prevention of undercooling and step-by-step freezing of subsoil. Purpose of the paper is evaluation of heat flow in the structure depending on heating fluid temperature and thermal insulation thickness.

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.

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.

The study deals with the measurement of microclimatic (indoor climatic) parameters and questionnaire survey in open-space offices. It describes the building, the air conditioning system and the parameters that have been assessed in the space. The paper shows the problems associated with the assessment of the thermal-humidity microclimate according to the subjective feelings of the occupants. It is an introductory work to the analysis of objective and subjective assessment in the space with uneven thermal-humidity microclimate.

Sufficient and well-designed ventilation of kitchens is a prerequisite for ensuring a high quality indoor environment in terms of temperature and humidity requirements. It is not only the removal of the produced steam and prevention of the subsequent condensed water flow, but also the elimination of all the harmful substances resulting from cooking (water vapor, aerosols or flue gases), odors and heat. Removing all pollutants from the kitchen area prevents the formation of molds and other microorganisms that could negatively affect the hygiene of the environment and the building structure of the entire space, thus affecting the operation of the kitchen. This article describes the design of kitchen ventilation according to the new set of standards ČSN EN 16282.