Paper describes selected effects of implementation of biomass microCHP generation in Czech legal conditions. Selected demonstration of biomass CHP is described and basic operational energy balances are presented. Comparison of microCHP and ordinary biomass boiler energy balance were performed. MicroCHP technology WAVE, which is being developed at CTU UCEEB in Buštěhrad, is described. Operational parameters of WAVE and future development outline were discussed.

As a legal expert I often deal with inadequate heating system function. What is common to these devices? Missing balancing valves. It is not possible to assess the flow in connected terminal units that would ensure the necessary transmission capacity from the heat source to the terminal units.

In the previous article we have focused on electricity consumption in the years 2010 to 2016. In this article we try to compare the operational costs with our neighbour's flat of similar size, heated by different source.

In the previous article we described our decision-making process. At the end of this process we decided to install electric radiant ceiling heating panels. In this article you can read how we have realized it.

The article deals in detail with the solar water heater from the EU Commission Regulation 812/2013. It describes what information provides the label and how it originated classification in the relevant energy efficiency class water heating.

The paper presents an example of solving the propagation of noise from an air/water heat pump installed in the basement of an apartment building. Air intake and exhaust are brought out on the façade of the building, where it is calculated the noise situation in the protected exterior of the building. In the interior it is solved the propagation of sound from the plant room to the protected interior space. In conclusion, the results are compared with the data from the report on measurement at the realized work.

For more than a year, a nearly zero-energy standard has applied to certain buildings. In the Czech environment, specific technical parameters for such buildings have been known for three years. And for over six years, the Directive on energy performance of buildings has been in force, imposing the obligation upon EU member states to introduce this standard.

Nevertheless, it seems that for many experts, including those in the field of energy, this term is still quite unclear. Many imagine buildings coated with photovoltaic modules from the ground to the roof, buildings which are better than passive ones or buildings which are self-sufficient, i.e. completely independent of public energy networks. Given the fact that the concept of a nearly zero energy building is very distant from such notions, and because this standard will soon become obligatory for all buildings, including small family houses, let's have a look at what a nearly zero-energy building really is.

The paper gives a simple method for calculating the annual production of condensate in the condensing boiler.

The article describes the impact of the contemporary and future legislative requirements for new buildings in terms of their conception and utilization of renewable resources. Soon, the requirement of quality standard is going to be effective in the Czech Republic that is called building with nearly zero energy consumption. That quality standard is defined at national level by legal regulations based on the requirement of European standard. On examples of family house, residential house and administration building, the impact of the to-be-established requirements for building conception is being demonstrated from the construction as well as the technical systems' point of view. With the existing development trend maintained it can be expected that a building with nearly zero energy consumption will have, comparing to an existing building, a better quality building shell, technical systems working with high efficiency and potentially may but needn't be, partially supplied by renewable energy resources.

This article summarizes the basic concepts of Commission Regulation EU 811/2013 and 812/2013, focusing on solar equipment, solar water heaters and solar packages. Describes the responsibilities of suppliers who place such products on the market.

Currently, it is common to design the heating system such as two-pipe. Automated computing programs contribute to this trend that other variants can not even rule. But for some buildings is single pipe system from the perspective of operation suitable and due to lower material intensity even better preferable. The author demonstrates this on specific example of a two-floor family house.

Paper evaluates the distribution of air temperature in residential room using a central system of ventilation. Depending on the position of the feeder element for fresh air is evaluated by several variations of the system. The presented results are output from the CFD simulation from ANSYS Fluent.

Apartment buildings often deal with the question whether it is preferable to install gas boiler in every apartment or to build boiler room and transport heat to apartments. The article proposes a procedure to obtain information for decision.

Paper shows the results of laboratory testing of heat exchanger and its application in real operation in household. Although the efficiency of shower heat exchanger reaches even above 40 %, achieved energy savings for hot water preparation range between 10 and 15 %.