Air change rate in a building depends on the weather conditions, building envelope tightness, operation of technical equipment and user activity. On object structural system P1.14/BA were during the heating season (1991–1992) monitored during the opening vent windows (wings). Take into account the impact of opening windows in addition to the minimum intensity of air change rate n = 0,5 + Δn.

Reducing the energy performance of buildings is very important. Equally important, however, is also the correct evaluation of energy savings. In practice, we meet with different approaches to the evaluation of energy efficiency, while some of them are far away from objectivity. This group also includes so called Energy League.

Power industry is one of the greatest producers of waste. The character of waste products from the power industry is quite different from waste arising from the other industrial sectors as concerns its composition, methods of removal and possibilities of use. There has been revealed within the solution of the project “The Resort Research Program in the Force of the Ministry of Environment” ref. no. SP2f3/118/08, bearing the name “the research of real properties of waste considered as an acceptable source of non-standard raw-materials (particularly the secondary by-products from the energy generation) in sense of actual legal requirements for the protection of health, environment and the evaluation of the acquired information for the determination of safety processes and requirements for their use”, that products used for the landscaping, in certain events do not fulfill requirements stipulated for the utilization of waste on the ground surface. It means that construction products made from remainders after the coal burning, being sold as safe, can contaminate the environment more than waste used for the same purpose.

This article focuses on the issue of creation of operating rules that pertain to the field of operational documentation. Operating rules are an essential part of the efficient operation of the property. This article is targeted to the content site of operating rules by various functional use of objects. A method of operation of the building affects the composition of future operating rules. In this article, the individual include the composition and structure defined according to the method of use of the building.

The efficiency of boilers is a major technical and economical parameter and indicates the degree of fuel energy utilization. The aim of this paper is to present basic approaches to determination of the efficiency calculated by direct and indirect method. In the Annex of the article is a list of technical standards (including theirs validity) which deal with determination of efficiency for various types of boilers.

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 radiant heat transfer.

Concept Data Support Department of the Ministry of Industry and Trade has prepared this statistical report as a comprehensive national statistics on renewable energy sources. The final part of the report provides statistical data of the categories Energy use of waste and alternative fuels, Hydropower, Wind Power, Photovoltaics, Solar thermal systems, Heat pumps and Geothermal energy.

Concept Data Support Department of the Ministry of Industry and Trade has prepared this statistical report as a comprehensive national statistics on renewable energy sources. The second part of the report focuses on energetic use of biomass.

The article expresses the author's opinion on the upcoming measure, which is being set up on the initiative of European Union legislation. This measure concerns the requirement for mandatory installation of the heat consumption meters in buildings with central heating.

One of the most important boundary conditions occuring in the thermal building simulations is the thermal power penetrated into building elements as a result of the solar radiation. Intensities of the solar radiation are usually measured by weather-stations on the horizontal plane, and thus not directly applicable for the computations. Paper provides the methodology for recomputation of the total solar radiation measured by the pyranometer on the horizontal surface to the intensities of arbitrarily oriented wall and provides simulation results for the nineteen days.

Article reviews the accuracy of the calculations of the underfloor heating in TechCON 4.0 version compared with calculations according to EN 1264.
Precision of calculations has been already compared in article “Calculation and design of hydronic floor heating” (Ing. Josef Bugáň). Article stated big differences in results, and several procedures were insufficiently explained. Is it possible that the calculation of commonly used program varies that much?
Could it be that these differences were caused by an incorrect procedure in the calculation according to EN 1264 or even by differences in the input data in both calculations?
In this article, we therefore compared the two calculations on the same project and the same program, thus completely eliminating input errors.
Correctness of the calculation procedure according to EN 1264 we verified by comparing the results of calculations with two independent programs.

In October 2013 in Orange County Great Park in city of Irvine, California, took place the sixth edition of the prestigious international competition of universities U.S. Solar Decathlon 2013. This round took part also Team Czech Republic from the Czech Technical University in Prague, which finished at overall third place. The article describes in detail building services used in the AIR House.

Small heating appliances are significant sources of air pollution. About 30 % of PM emissions and about 60-80 % of PAHs originate from domestic heating appliances in Czech Republic. Four main parameters affect the amount of emitted pollutants (type of combustion appliance, fuel, operator and condition of combustion appliance). This article tries to clarify the influence of firewood moisture and reduced heating output to emission of pollutants. There are compared results from 6 test runs with respect to emissions of CO, OGC, PM and benzo[a]pyrene.

Decree deals with insulation for the distribution of heat and hot water, but does not prescribe anti-condensation insulation thickness, t. j. Insulation for cold water distribution pipes and cooling ventilation and air conditioning.

The evaluation of the heating period for the calendar year 2013 is useful for producers and consumers, who work on a January-December regime. It also provides data to energy experts for assessing the operational energy consumption of buildings. It also provides figures for the controlling of boilers, according the Decree 276/2007 Coll.

Uncertainty of input parameters affected the behavior of people: internal temperature, internal heat gains, air exchange rate enter into the calculation of standardized assessments by EPB. The analysis of these parameters is accurate through operational rating.

The article describes the design of solid fuel boilers. Primarily addresses the question of what material is suitable for the construction of the boiler body. Whether steel or cast iron?

The paper presents the derivation of calculating the real efficiency of gas boilers with single-stage atmospheric burner. The cause of looping are states when the minimum boiler output is several times higher than the required nominal heat output for heating. The looping of boiler reduces its operating efficiency.

This article describes the measuring of six different floorings´ surface temperature with floor heating system, calculation of local heat flux in according to ČSN EN 1264 standard and comparison of the obtained values.

For the operation of the gas boilers is necessary to ensure the supply of combustion air, and in the boiler room need to guarantee adequate ventilation. Here will be presented formulas for the design of the flow of combustion and ventilation air for the gas boilers type B and for the coal boilers.