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 article shows part of the evaluation of the energy performance of a large building according to CSN EN 15316-2: 2018 and especially how the advantage of different methods of heating changes with the height of the building. It also includes a more detailed specification of some of the descriptions in the standard of ambiguous inputs.

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.

The disadvantage of the family one-storey bungalow is the larger built-up area and the cooled envelope and thus higher specific heat consumption for heating compared to a compact two-storey house. The author offers a comparison of variants of bungalow heating by Total cost of ownership (TCO) method in Slovak conditions.

Achieving the criteria set for effectively district heating will be a precondition for the development of central heat supply in the coming period. Heating companies are therefore looking for suitable alternative solutions. In this paper it is the view of the designer on a concrete example of the combination of the use of geothermal water and CHP.

Based on the yearly operation of a specific device recovering heat from waste water discharged into the sewerage system for hot water preparation, the author documents the true potential of energy savings.

Is it advantageous to apply zone regulation in individual rooms, especially in family houses? The paper describes results of analysis of the effect of zone heating in two different types of heat transfer on the internal operating temperature in the analyzed zones, which have a common partition structure.

Here is an overview of indicators of thermal dynamics of radiant systems. In addition to traditional indicators such as time constant and response time, the possibility of using alternative indicators such as heat transfer efficiency and the number of operating cycles is emphasized.

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.

Wood burned in a boiler, stove, fireplace insert should have acceptable humidity to ensure efficient combustion and minimize air pollution. The drying process, suitable conditions and time required are described in the article.

The basis of the selection is a table including used types of radiant and hot-air heating of large buildings. The individual options are briefly commented, while their advantages and disadvantages are stated so as to lead the investor to choose the optimal solution for him.

Methods and instrumentation for injection quality measurement in heat pump boreholes including measurement of groundwater flow through the borehole outside the partly grouted borehole exchanger tubes have been developed in the Czech Republic. A Semtex charge has been developed for the rock massive repair, which reliably disconnects the ground exchanger tubes without serious impacts on the surrounding rock environment and buildings. The resulting hole can then be used for re-grouting, thus preventing undesirable vertical water flow through the borehole.

This article aims to clarify especially for the general public, the principle of the chimney draft and simultaneously explain its importance to assess the functioning of the flue path. It demonstrates that the measure can not replace a chimney control, or clearly describe its functionality, but it is just one of the many immediate operational parameters.