Supply of gas or electricity is so important that many customers do not want to risk a possible interruption when changing suppliers. New legislative rules defined in an amendment to the Energy Act No. 458/2000 Coll. (as amended by Act No. 211/2011 Coll.) but fill existing gaps in legislation and establish a procedure for changing supplier.

Regular inspection is focused to the boiler, smoke flue and accessories condition, its security and regulation. In addition to the technical condition and maintenance, the documentation, operating instructions, manuals and other documents are under inspection. It quantifies the overall boiler efficiency of measurement results, sets reference respectively minimum boiler efficiency and suggests possible actions.

The possibility to choose supplier of gas is available since 2007. But only last year and especially this year the gas market has developed so much that it is possible to save up to 30% of annual costs for heating and hot water in a family house with change supplier.

Oil is the energy source No. 1, and the world is in a period of peak oil. Serious paralysis of economy after peak oil is almost certain, because economic growth demanded increasing consumption of fossil fuels from the beginning of the industrial revolution.
The Czech Republic can ensure its energy security only in integrating with Europe, and especially the connection to Europe's energy (especially electricity and gas) and transport networks and participation in the transformation of post-fossil energy and transport system.

Gray water use system in buildings is not only suitable for new buildings, but also for buildings under reconstruction. However, it is necessary to calculate the profitability of gray water use for each building separately.

The article is the result of surveys conducted in the work of raw material and energy department statistics, the Ministry of Industry and Trade. Material published in August 2011 includes data on molded (formed) fuels (briquettes and pellets) made from biomass (wood and plant), peat, coal and paper.

The contribution is focused on the systems of cool production for air-condition units. The first part of the contribution deals with the now-a-days cooling requirements of buildings. Then, the frequently used cool production systems are described and compared each other. The absorption cooling systems and the vapor cooling systems are compared. The most frequently used applications of the cooling absorption cycles are presented, namely tri-generation systems and district cooling systems.

In relation with the present discussions on the use of solar energy it is useful to mention one important stage of Czech agriculture - the production of really high-quality roughage. Besides the development of methods of silage and haylage, thirty years ago the researchers looked at final drying of forage in large-scale haylofts using air solar collectors.

The paper deals with identifying suitable areas of use of small cogeneration units fossil fuels and renewable energy sources in municipal and industrial uses. Discusses the advantages and disadvantages of cogeneration units based on internal combustion engines, gas turbines and steam engines, including their position in the electricity grid

The article is intended for designers and network operators and aim to help to easily design thermal insulation, without worrying about European regulations and easily realise the insulation design, without lengthy and, in the case of heat transfer coefficients, unnecessary calculations.

National Renewable Energy Action Plans (NREAP) of each EU countries in graphical and tabelar forms. Part three - final energy consumption for heating and cooling and share of RES on the consumption for heting and cooling.

The paper discusses the alternative heat sources to central district heating for panel buildings. Nowadays, most of the reconstructions of panel buildings cover only the improvement of thermal quality of the building envelope in order to decrease the heat loss and the operating costs of heating. With high-quality insulated envelope it is possible to achieve high reduction of thermal heat loss. Additional reduction of heat loss on the envelope insulation side is very expensive. In order to reach another reduction of operational costs in the building it could be more efficient to change the heat source with cheaper energy.

There has been a lot of talk lately about disconnecting from the central heating supply. And not only that, some housing cooperatives and unit owners have already taken this step, or are planning to do so. Are those who have disconnected from the central heating supply, and have their own boilers, satisfied and have they saved money?

A revised version of the directive was issued in 2010 under the title 2010/31/EU. In part, it is a modification of the original. In it, there are have been defined new administrative tools to increase the energy performance of buildings - among others, it includes the concept of "building with almost 0 energy consumption".

Due to rising energy prices heating systems face a number of disadvantages associated with the use of central heating supplies to heat residential and non-residential spaces. This is a strong trend in condominium owned residential buildings in the care of SVJ, in rental housing it is almost non existent and it is contradictory in cooperative housing, which is a modification or rental housing.

CPP is on the brim of a big transformation. For more than 1,5 million flats, council heating means the most comfortable, and we still believe the most ecological, heating method. That is because the centralisation of heating allows the deployment of advanced technology that is more efficient, environmentally friendly and economical. This article offers a brief explanation on how to economically optimise the processes and systems to facilitate the transformation of CPP systems.

Currently in the Czech Republic we observe relatively large development of energy efficiency projects including energy production from RES, in particular electricity. This development is interconnected with the current legislative framework for such support in the Czech Republic and related support mechanism in the form of investment and operating subsidies for electricity production from RES. Current status of implementation of these projects is particularly affected by our membership in the EU and the subsequent implementation of the EU respective directives into national legislation. Furthermore, the Czech Republic has achieved a significant success in international emissions trading (IET International Emission Trading) by selling its surplus CO2 emissions under the Kyoto Protocol. In comparison with other EU countries the Czech Republic belongs to the frontrunners in terms of implementation of energy efficiency projects, mainly in the context of recent strong development of photovoltaic power installations. The article presents a basic overview of Operational Programmes financed by SCF EU, under which energy saving and RES projects in the private and public sector are supported, the Green Savings programme, designed for household sector and financed by selling CO2 emission surplus, and the system of feed in tariffs for RES electricity production. Based on currently available ex-ante evaluation of the supported projects the article quantifies the anticipated benefits of these projects in terms of savings in the final energy consumption and in terms of increase in energy production from RES.

Elementary principles of the most significant and the most perspective types of fuel cells are presented (AFC, PEFC/PEMFC, PAFC, DMFC, MCFC, SOFC). For every of the fuel cells the main operational characteristics, chemical reactions, advantages and disadvantages are presented.