The well-operated modern boilers for solid fuels have higher efficiency thus, the utilization of the energy in the fuel is better than at the boilers with old construction. This should mean that the new boiler has lower consumption of the fuel and the costs of the heating season should be reduced (for the same heat demand). But is it true? Will the new boiler really burn less fuel than the old one? This calculator allows us to calculate whether and how much we can save for the heating season.

The paper is targeting verification of the possibilities to utilize solar systems with long-term heat storage in residential buildings. Several ways are evaluated how to connect the long-term heat storage system with hot-water storage tank (system with and without use of heat pump, different ways of charging the storage tank, variants with stand-by storage tanks). Evaluation of the system is performed by TRNSYS simulation software.

Article features practical examples for determination of tempereture class of chimneies with combustible and fire – resistant construction of external wall of chimney.

The article introduces calculation fundamentals, the computational relations for submission of chimney into temperature class according to thermal technical material parameters and to building construction fire resistance. Methodology is used according to CSN EN 12 391-1.

In the first part of the article the methodology of calculating the energy efficiency of apartment buildings heating was described, including a practical example. Key parameter for assessing the efficiency of heating is the volume of active heat gains. This sequel is dedicated to their calculation.

Energy savings are undoubtedly one of the greatest challenges of today. There are several subject areas, but most significant ones are: transportation, electricity consumption and heat consumption for heating. In the following we focus only on the last one from that trio.

The article refers to the new European subsidies for the replacement of boilers in the Czech republic. The author responds to the statement of the Minister of the Enviroment Richard Brabec who said, that the much debated permision to subsidize boilers, which were not verified by an independent authorized person, was necessary because of the requirements of the European legislation.

We calculate insulation thickness in accordance with the criterion of maximum heat loss and monitor unwanted warming or cooling media and maintain the required temperature.

This article reflects the author's view on the issue of emissions from the combustion of solid fuels in small combustion appliances and theirs decreasing by subsidy for boilers’ change. For maximum efficiency of subsidies, author recommends: 1) replace old boilers with modern gasification and automatic boilers, 2) subsidize only boilers certified by independent accredited laboratory, 3) optimize settings of newly installed boiler according to the measurement of flue gas composition and efficiency, directly at the new operator, 4) periodically check emission parameters in real conditions.

Article is dealing with gasification principles and gasifiers. Gasification is process for gas producing from solid fuels (coal, wastes, biomass). Producer gas can be used in cogeneration unit (piston engine or combustion turbine) for generating of heat and electricity with higher efficiency in comparison with combustion in boiler. All processes in gasifier taking place with regulated supply of gasification media (air, oxygen or steam) and reaction heat.

The article returns to the topic of measuring of heat consumption. This obligation is based on Directive 2015/27 / EU, nevertheless during the creation of our national rules, we have encountered a significant problems related to the correct interpretation of concepts of measurements and indications.

Radiators as well as other technical equipment in buildings, and generally any equipment in a building, require occasional maintenance and cleaning. While on the surfaces of floor, furniture, windows, doors, hygienic facilities, etc. there is usually held regular cleaning, elements of heating systems, including the end elements in the interior, are often neglected. The aim of this work is to familiarize with the results of measurements carried out within the framework of experiments focused on microbial load of different constructional designed radiators located both in public buildings and private homes.

It lasted incredibly long, but we finally have an updated prescription, to which all owners of apartment buildings were anxiously waiting. Until now valid Decree no. 372/2001 Coll. is becoming past since the start of January 2016 and a newly heat for each unit to allocate according to Decree no. 269/2015 Coll.

The paper sums up the current legislation for refrigerants and focuses on Regulation 517/2014 of the European parliament and the Council on fluorinated greenhouse gases which repeals the Regulation 842/2006. The major requirements for operation, service and delivery are presented in the paper. At the end of the paper the predicted evolution of major types of refrigerants for heat pump is given.

The fundamental problem for designer is to calculate right size of hot water tank. Designers tend to underestimte or oversize the size of the storage tank very often. It results in very low efficiency of DHW or malfunction. Author of the article shows a possible design approach.