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.

New rules for cost of heat energy allocation for central heating in houses applying evaluative indicators for these purposes. The Minister for Regional Development approved a draft amendment to Decree No. 372/2001. This amendment allows to increase the share folder of running radiators up to 70 % of total heat energy cost. The distribution of this component to final consumers suffers from a significant systemic problem, and these measures will further worsen the credibility of allocation results.

The object of article is to provide basic information about approaches to testing of stoves burning solid fuels in Europe and some other countries. Generally, stoves in Europe are tested according standard EN 13240. However, there’re other standards on national basis, for example Norwegian standards NS3058 and NS3059. If we look away from European border we can found standards which describe methods of stove testing – Australian/New Zealand standards and EPA standards in U.S.A. The article provides information about measuring sets, characterization of used fuels, testing categories for burning periods, measured parameters, emission limits and others things which are in these standards.

Biomass Action Plan envisages the available space in 3 variants with respect to the degree of self-sufficiency in food C.R. Area of fast-growing tree species growing steadily, in terms of total energy production is negligible involvement. By registering, according to the law of ash can be removed from the category of waste, and consequently can be applied as fertilizer.

Chimneys with ceramic chimney casing either monolayer (where the chimney casing creates a chimney vent) or multilayer (where the chimney casing is completed with insulating layer and a chimney liner), are a better solution in terms of fire safety of wooden houses.

The object of article is to provide basic information about approaches to testing of stoves burning solid fuels in Europe and some other countries. Generally, stoves in Europe are tested according standard EN 13240. However, there’re other standards on national basis, for example Norwegian standards NS3058 and NS3059. If we look away from European border we can found standards which describe methods of stove testing – Australian/New Zealand standards and EPA standards in U.S.A. The article provides information about measuring sets, characterization of used fuels, testing categories for burning periods, measured parameters, emission limits and others things which are in these standards.

Heat meters are working set gauges and installation can only be performed by a registered company in the Czech Metrological Institute. Yet they are very often used and installed improperly or incorrectly. The following text should be specific instructions on what to avoid during installation of heat meters.

Several regulations gradually tightened thermal characteristics of buildings in France since 1974. The last of them, called RT 2012, based on the requirements determined since 2008 by the national decree „Grenelle de l ‘Environnement“ is important step to nZEB buildings.

The heating period 2012/2013 in Prague based on the observation of Prague-Karlov Station was 234 days, a little longer, and with an average temperature of 5.0 °C, slightly warmer than the long-term average. The basic characteristic of heat demand for heating is 3266 D°(19) degree days, hence, the heat demand is slightly higher than long-term average 3224 D°(19). In the last decade, it is the highest number of degree days for a heating period and the second highest number of degree days than long-term average.

Opinions of the professionals concerned on the issue of fire safety in the operation of chimneys, flues and fuel appliances that address the Government Regulation No. 91/2010, are very different. Since this is a very serious issue, TZB-info wants to provide space for professional discussion, which result should be the unification of opinions.