The article shows the ways of using load profiles of hot water heaters defined by Commission Regulations No 811, 812, 813 and 814/2013 to construct a cumulative hot water consumption curves. The authors point out errors commonly made by designers of hot water preparation systems in relation to the use of the load profiles. The conclusion of the article contains a comparison between consumption curves obtained with use of the hot water heaters’ load profiles and real measurements in different types of buildings.

Stricter ENB criteria and efforts to enforce a comprehensive view, not only the energy needs associated with housing, but also the place of residence, mode of transport, etc. show that the current situation is not systematically resolved. Meeting the new criteria in existing buildings, many of which have not even undergone basic insulation, will be very challenging, albeit necessary.

Conference paper debates results of researches into wall heating which are showed that placement of wall heating panels in interior walls results in a lower heat loss than placement in outer walls, and that wall heating can have equal or better energy-efficiency compared to floor heating and conventional radiators.

Thermal baths in Slovakia are producers of wastewater, which have considerable enegry potential. Wastewater often exceeds the maximum temperature that can be discharged to the recipient without harming the environment. In many cases, this requirement is not met, and swimming pool operators must face sanctions for environmental pollution. The aim of the paper is to present the possibilities of using the energy potential of wastewater, which would ensure its required temperature.

The paper focuses on the sizing of chimneys for fireplaces in which wood is burnt. Before the dimensioning itself the combustion equation and the derived equations for determining the flow of fire-wood and the flow of combustion air and gas are listed. At the end, the paper provides an example of calculation.

The article summarized overview of currently used refrigerants and termination dates consumption of prohibited refrigerants. In the past, refrigerant was used based on fully halogenated hydrocarbons (CFCs), later it was partially halogenated hydrocarbons (HCFCs), and currently are the fluorocarbons and mixtures (HFCs). The paper discussed important laws and regulations, which set out the requirements for the use of refrigerants.

Increasing or decreasing the heat factor of the heat pump does not reduce or increase the energy consumption in direct proportion, as the specific example shows. Instructions are also provided on how to evaluate the advantage of heat pumps with different heating factors.

Electric heating systems can be divided according to several criteria. One of them is way of heat transfer. The distribution of thermal energy from one place to another may occur through convection, radiation or conduction. In this article we will focus on the convection heat transfer.

The article divides the openings into the chimney according to their purpose, states the method of making the individual openings, including the conditions based on ČSN 73 4201.

Ventilation infiltration in the form of leaking windows, doors is associated with unwanted heat leakage in cold periods. The size of the leakage depends on both the intensity of ventilation and the amount of energy contained in the air. The calculation should include not only the specific heat capacity of the dry air, but also the energy contained in the water vapor in the air.

The article deals with the principles of calculating the monthly method of supplied energy for heating. Describes in a clear form the individual mechanisms of calculation according to the relevant standards. It is designed for the needs of energy specialists and the professional public.

The article deals with the principles of monthly calculation of heat demand for heating and cold for cooling according to ČSN EN ISO 52 016-1. The article clearly presents the individual calculation mechanisms for the needs of energy specialists and the professional public.

The assessment of the energy performance of buildings depends on a large number of calculations, which must comply with the applicable legislation. The article presents the related structure of legal regulations, including standards and their brief characteristics.

The type of chimney determines the suitability, use, conditions of chimney installation and also plays a role in the flue gas discharge from solid, liquid and gaseous fuels. The distinction of chimneys into separate or common chimneys, system chimneys, individual and additionally lined chimneys, etc. will be described in this article.