Commonly practiced simple statistical analysis of heat consumption shows differences of measured values, but not thermal energy savings, for which the buildings are insulated and the heating systems re-regulated. Differences of measured values at different temperatures inside buildings have no practical benefit for the consumer because they say nothing about the actual and they do not allow to adjust the heating mode nor by changing the behaviour of people in apartments, nor by any other instrument. Heat consumers lack information on the relations between the average internal temperature of objects during measurement of heat consumption, on the influence of heat gain and possible heat savings in compliance with the legislation provided average internal temperature of the object.

Sloping roofs have been being built for centuries. Until recently, these roofs had only one purpose - to protect the building from rainwater, snow or other climatic influences. Let's look more closely at the current issue of excessive moisture in the roofs and let's show with pictures some specific examples.

According to heat need for hot water and heat loss during its generation and distribution it is determined the energy demand for heat source. Identification of hot water need and heating demand for its generation and distribution is also necessary for energy certification of buildings.

Maintenance system based on rules of TPM (total productive maintenance) depends on phases of maintenance. Elementary task of well TPM system setted, is maximal allimination of unscheduled equipment shutdown which are caused by logistic and technologic downtime, but at firs downtimes caused by unplanned maintenance. This kind of maintenance mean reduction of production capacity, and advent to insufficient attention by prevention.. Interval of diagnostic quantity measurment, is part of predictiv maintenance which helps with plannig of preventive intervention and eliminated cause failure before shutdown. In order to check the operating parameters it is possible to use vibrodiagnostics, tribodiagnostics, termodiagnostics, non-destructive testing methods and others. It's difficult to choose the right moment to implement maintenance inspection in order to exploit the whole equipment life time and reduced risk of breakdown failure. The fundamental rules for determining the maintenance measurement interval in the diagnostic management system has not been established. Therefore, the emphasis is on determining the interval for measuring of the implementation of periodic data collection, which is more often used than the on-line diagnostic systems for secondary production techniques and technologies with a parallel backup. Results in Johnson Controls manufactury showes, that with technical diagnostic system and with measurement in flexible interval is possible to achieve savings over 2 mil. All this during continuos production of key technology without possibility to do major maintenance in weekly production capacity. TPM system settings from basic level activities to advanced diagnostic methods helps to run equipment in optimal mode whith minimal divergances of cutted piecies outputs, Undeniable contribution to maintenance is also a fact that by making a service action with the deployment of dynamic range measurements, it can even closer determine real life time of bearing and it is possible to use of the maximum potential production of equipment.

CONTAM is a simulation tool used to analyze temperature and air flow in more zones or complex of buildings. It monitors the concentration and spread of contamination in the building, such as CO₂, depending on the movement of people in the building.

Nowadays there is emphasis on energy savings and utilization of renewable energy sources. Therefore, proper selection and design of the heating / cooling system, which should be also able to provide favourable condition of the thermal environment – thermal comfort, is very important. Warm water floor heating is a progressive way of heating, which decreases operation costs on one hand and creates ideal temperature distribution on the other hand.
Decreasing of energy costs leads to increasing interest in systems with better efficiency and thermal comfort. Utilizing of renewable energy sources along with installation of low temperature heating systems results in decreased primary energy consumption and leads to lower operation costs.
In this article experience with application of the new European standard (EN 1264, 2009) for calculation and design of warm water floor heating is presented. The calculation has been carried out for a reference room in a family house, by means of software with application of floor systems from different manufacturers.

The article discusses the latest findings on the genesis of disinfection by-products in connection with the use of chlorine, chlorine dioxide, ozone and UV radiation as a disinfectant.

Measurement of natural lighting should be performed in a dark surrounding terrain. In light terrain (landscape covered with snow) only for completion. With regard to the brightness of the sky, its stability and colour of sky, it should be performed at the time around noon. It shouldn't rain or be fog. Disadvantage is requirement of uniformly overcast sky, because it happens only few times a year.

The amount of volume coefficient depends on elevation of location of gas consumption and the temperature of gas flowing through the gasometer. In this paper we describe the procedure by which you can check that the coefficient of volume on the invoice is correct. The coefficient is one of the factors that affect your cost of gas.

At present, nobody knows how the energy future will look like. What is certain is that fossil resources can be depleted in the horizon of decades. Proven reserves of uranium – if the power consumption should be replaced by current reactors – would last for only a few years. There are only three promising energy technologies: nuclear fusion, fast breeder reactors with closed fuel cycle and renewable energy sources, along with energy efficiency. While commissioning of the first fusion power plant is expected the earliest by 2040, and demonstration plants with so-called generation IV reactors in 2030, renewable energy sources are already massively installed at present. Construction of nuclear power plant is always more expensive and takes more time than originally planned. Situation of renewables and especially photovoltaic is the reverse – they are built faster and the prices are lower than anyone imagined.

Regular inspection is focused on boilers and smoke flue, its accessories, security and regulation. The article presents the second example of inspection of an old thermal system with modern atmospheric gas boiler in a house with new windows and thermoinsulation of the facade.

Regular inspection is focused on boilers and smoke flue, its accessories, security and regulation. The article presents an example of inspection of the thermal system with older atmospheric gas boiler in a house without insulation. Technical details of the revision are completed with final report as a result of the inspection .

Secretary of State for Energy and Climate Change, Chris Huhne, proclaimed: "Renewable energy technologies will deliver a third industrial revolution." He criticised "faultfinders and curmudgeons who hold forth on the impossibility of renewables – the unholy alliance of climate sceptics and armchair engineers who are selling Britain’s ingenuity short."

The experiment aims to evaluate the suitability of algorithms to simulate the lighting in the ESP-r and to compare the energy consumption "classical" and "intelligent" lighting.

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 article deals with the complex graphical representation of parameters of hot-water heating system, which describes in very instructive way individual states during the heating season.