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.

An apartment that its user lets cool down below the temperature specified by building and hygiene regulations causes an excessive need for heat in the neighboring heated apartment. It may not be possible to achieve the guaranteed thermal comfort in a heated apartment.

The general term stainless steel does not describe the differences that exist between different types of stainless steel. Therefore, in the field of chimney systems, it is necessary to pay increased attention to the selection of suitable steel. Both on the part of manufacturers and chimney companies in the production of various accessories for chimney systems and, to an increased extent, also for fuel appliance operators.

The article considers the standard EN 442-2, which assumes a linear course of the temperature exponent with height for a given type of radiators. It focuses mainly on panel radiators, although it does not omit other kinds of radiators. It points to the fact that the dependence of the temperature exponent on height is not linear and increasing for a given type, as assumed by the characteristic equation of the type. Results are based on the evaluation of the data collected from the radiator manufacturers.

The heat pump with earth wells is a source of heat and cold for a university building in the center of Prague. Analyzes of measured data from the operation of this system are performed and the issue of parallel production of heat and cold in the context of sustainable development and buildings with minimal energy consumption is discussed.

The common view that heat pumps are only suitable for new or refurbished buildings with a focus on energy can be considered obsolete. This is evidenced by the results of research at the Fraunhofer Institute (ISE) found in older buildings in several long-term projects.

High quality of the indoor environment expressed by indicators such as air temperature, relative humidity, concentration of carbon dioxide, or lighting has great impact on human health, comfort and performance. Therefore, the contribution focuses on the effect of an increase in indoor temperature on energy consumption.

The author describes a systematic procedure leading to the processing of the audit and provides an overview of the necessary documents. The elaboration of the audit and the implementation of the proposed measures is a basic prerequisite for savings. Without subsequent evaluation of results and adjustments of operating modes, etc. however, the expected savings effect may not occur.

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.