Methods of cost allocation in apartment buildings have undergone significant changes in recent years. The article offers a comprehensive overview of cost allocation methods in multi-dwelling units according to applicable regulations. It is intended mainly for owners of residential units, board members of homeowners associations, managers of housing cooperatives or individuals and companies managing residential buildings.
Cost allocation in apartment buildings is currently governed by two laws: Act No. 67/2013 Coll. and the new Civil Code No. 89/2012 Coll. These laws governed cost allocation in calendar year 2014 and apply also for 2015. The heating and hot water supply costs in MDUs from 2016 onwards will be allocated pursuant to the new decree No. 269/2015 Coll. and the amended Act No. 67/2013 Coll.

Even in 2016 can receive a contribution of up to 20 000 CZK for an apartment can the reconstruction of the water supply in houses where old lead pipes. The objective is to reduce the lead content of drinking water.

Owners of residential buildings and their tenants must ensure the implementation of some activities on the technical and fire safety devices in order to ensure their safety and functionality in use. Inspections and checks are therefore not just binding on the applicable regulations, but also may prevent damage to health and property.

There are two standards for microbiological examination of samples for the presence of Legionella bacteria. Using them we can get valuaes not only to compare, but sometimes also as a signal to the challenging economic adjustments and changes in the system of production and distribution of hot water.

The article reports on the reasons of soil waterlogging, impact of ground water on structures, and on drainage systems and measures to eliminate the waterlogging effects. Furthermore, there is an information about pertinent requirements of statutory regulations and two schematic maps of waterlogging of soil in the Czech Republic are shown.

The new Civil Code recognizes contribution to the management of the house and land, contribution to its own administrative activities and deposit services.

During a recent revision of CSN 75 5455 were in the process of determining the calculation of flow made only minor changes. The reason was the lack of measured flow. Therefore, at appropriate occasions perform additional measurements. For these measurements is determined also water consumption and its distribution throughout the day.

For example, 25 kW boiler produces in operation 10 hours per day, about 35 l of condensate per day. Drain condensate from condensing boilers must be connected to the sewage system. The condensate is acidic, therefore it is necessary to use a suitable material elements drains.

Second part of serial focuses on solar collectors. Basic axioms of solar thermal engineering are lost if designer or installation company wants to supply the a solar system at all „costs“. It is not easy to recognize the quality of solar collector at first sight. But i tis simpler and less expensive to make a cross-check of the solar collector than to replace one after another by new ones because of low heat output.

First part of serial aims at general quality of suppliers and above all at purpose of the solar system installation. It is very difficult to identify the purpose of solar system supply for installations without any planning and energy yields calculations.

This article support consciousness about DMI-65 known as powerful iron and manganese removal from contaminated water sources. It was confirmed by testing DMI-65 that it can remove iron and manganese lower than particular national code requires. The ideal operating condition was reached for this application. The only chemical added for correct function of DMI-65 is sodium hypochlorite.

Pool water treatment is associated with a dose of disinfectants. Chlorine is the most common disinfectant, which is used for treatment of swimming pool water. Nowadays chlorine-free disinfections are tested, however chlorine is used in various forms for swimming pool water disinfection about 100 years. The article discusses the use of chlorine preparations for swimming pool water disinfection and giving practical examples of water disinfection in six swimming pool campuses.

Application forms for permits for the abstraction of groundwater are not uniformly understood and completed today. Correct completion of certain sections, as well as assessing the impact on nearby wells, requires knowledge not only of the annual quantity of water withdrawn. It is also necessary to take the time variation needs into account. For its estimate there is no prescription today. This article proposes how to understand and fill out these sections of the hydrological point of view. The hydrogeological assessments of same wells and plots must be based on the same initial values. This article proposes to use the principles of the defunct Guideline (1973) for calculation of maximum daily and monthly water consumption and for minimum required yield of wells. Calculations are based on annual water requirements set by legislation in force today.

From the perspective of building manager is not enough that the water flows. In addition to economic and operational problems in terms of impacts on the health and life of people and there is also a need to focus.

The article discusses the possibilities of processing sludge from water treatment plants. Describes facilities for thickening and dewatering of water treatment sludge. In the Czech Republic for sludge thickening are most often used different types of tanks, flotation is used less. For sludge dewatering are used gravity dewatering facilities – sludge beds and sludge lagoons, from machine dewatering facilities are most commonly used filter presses and centrifuges.

The article deals with the possibility of using sodium water glass when removing chromium and phosphorus from raw water. To verify the effectiveness of chemical was carried out a series of laboratory experiments to determine the appropriate dosage and workflow to delete the selected pollution.

Cadmium is a component of some pigments and used as a stabilizer of some thermoplastics, eg. PVC. In the combustion of fossil fuels, plastics, and passes cadmium into the atmosphere. Subsequently, the heavy metal gets due to atmospheric water from contaminated atmosphere into the soil.
The article describes the sources, forms and health risks of cadmium in water and mainly removal of cadmium from water using sorption materials CFH 0818, Bayoxide E33 and GEH. The results of laboratory measurement show that all three materials were able to reduce cadmium concentrations well below the limit of decree no. 252/2004 Sb.

By considering the savings on the cost of water and sewerage return using gray water in a small hotel in the Krušné hory showed that the payback period is around 10 years with the aqueous saving of about 20 000 CZK per year. The solution is both economical and environmentally friendly and natural resources.

Waste water that ends up in the sewer network contains a large amount of energy. Utilization of this energy, which is also available throughout whole year, is not yet part of the standard engineering practice in the Czech Republic. This article brings an inspiration in the form of experience from Austrian city of Amstetten, where was implemented a project, which is using combination of a sewage heat exchanger and a heat pump. State of the art as the same as the factors affecting the utilization of waste heat are also included.

The heat from the waste water can be taken from external or internal drainage. In case of external drainage is a pipe with flow min. 15 l/s and pipe diameter min. 800 m. Waste heat in buildings can be used to preheat the hot water.