The author deals with the consequences of failure to comply with the conditions for safe operation of gas appliances. In addition to project design and implementation pays attention to neglected maintenance of gas appliances in categories B and C.

The evaluation of the heating period for the calendar year 2010 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.

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.

Based on the observations made at the Prague-Karlov station, the 2009/2010 heating season was a little shorter, 217 days, and the average temperature was 4.3ºC, slightly cooler than the long-term average. The basic characteristic necessary for heating is 3187 dº (19) degree days, so the needs for heating were slightly lower than the long term average.

On November 1st, 2010 the new CSN 73 4201 “Chimneys and flues. Design, implementation and connection of fuel appliances” came into force replacing the standard with the same title and number from January 2008.

Low energy (LEB) and passive buildings (PB) are becoming standard for new constructions in EU countries. They aren't experiments anymore, but absolutely ordinary mass production of sophisticated residential buildings. Only in Germany, Austria and Switzerland there are already thousands of buildings that meet the passive standard and their number doubles every year. The cost of passive buildings is only 5-7 % higher than those of conventional ones, and yet, their consumption of energy and heating is up to 90 % lower! Part 2. about regulation ventilation system.

On November 1st, 2010 the new CSN 73 4201 - Chimneys and flues. Design, implementation and connection of fuel appliances" came into force replacing the standard with the same title and number from January 2008.

The article deals with price comparing of the electric energy suppliers in the regions of the Czech Republic. The graphs in the example shows the difference of the prices for tariff rates D02d and D56d.

The article deals with price comparing of the natural gas suppliers in the regions of the Czech Republic. It is clearly shown in the graphs how to save financial costs with the change of the supplier of natural gas - from the expensive to the cheaper one.

Low energy (LEB) and passive buildings (PB) are becoming standard for new constructions in EU countries. They aren't experiments anymore, but absolutely ordinary mass production of sophisticated residential buildings. Only in Germany, Austria and Switzerland there are already thousands of buildings that meet the passive standard and their number doubles every year. The cost of passive buildings is only 5-7 % higher than those of conventional ones, and yet, their consumption of energy and heating is up to 90 % lower!

Author raises discussion and proposed changes in the rules of the energy audit. Draws attention to the criteria for evaluating alternatives and to small requirements for variability solutions. Read controversy of the author and reviewer who considers the methodology as sufficient and sees a problem in processing audits.

Boiler room with gaseous fuels are undoubtedly the work, which is necessary primarily for the protection of the public interest (safety, protection of life and health of people, etc.) to pay attention to the stage design and installation. Extension, then ensure their safe and reliable operation.

The author of this expertly written article shows, with results practically verified, that the proper functioning of heating with savings of up to 40% with a 1.3ºC increase of internal temperature can be guaranteed only with the proper activation of temperature sensors and with a complete projected adjustment of thermoregualted valves and heads, which traditional heating projects do not address. That is why traditional heating projects do not provide neither the proper functioning, nor full heat savings from the control technologies.

On Jan. 1st, 2011 the Government Regulation 91/2010 Coll., on the conditions of fire safety during the operation of chimneys, flues and fuel appliances, will come into force. On that day they Decree no. 111/1981, on the cleaning of chimneys, will be repealed. The following text is focused mainly of the provisions related to the venting of gas appliances.

The paper presents functionallity and basic principal of control systems used in building automation area. Integration of systems based on software and hardware platform is also described.

Designing solar systems so they will produce the the most heat during the year or electricity at the lowest cost is quite a complex matter. A number of factors should be considered when calculating the solar systems, especially the intensity of the solar radiation in individual locations throughout the year. Without a simulation software that can work with this variable data, the calculation can only be very approximate. If we want to get more accurate results and fast, using sofware is esential.

The presented article describes the basic introduction into building automation systems. The overview of main standards and protocol used in building automation systems are described in detail.

Article provides detailed information about long-term tests of heat pumps, made by the agency Frauhofer ISE. It monitored the effectiveness of the use of heat pump air-water, ground-water and water-water in the 170 low-energy houses and in existing buildings. Author used the measured values of seasonal performace factors and the current energy prices in the Czech Republic to present the differences between different types of heat pumps and heating systems.

Imact of heat cost allocation measurement on heat consumption is discussed in the introductory part of the paper. Two different ways of heat balance are described further. One, based on heat incoming into a measured room, and the other based on heat leaving the room. In both cases the heat cost allocator‘s measured values are compared with economic behaviour of a flat user. Cost allocator’s measured values are converted into heat cost ratio on total heat cost of the whole building. The measured values of indicators and their variance are compared under operational conditions with billed price for each flat user.