Issue 5/2001

The article informs about the new valid standards and regulations concerning the field of building sites. The complete list of valid regulations and standard concerning this field, including all issued and approved standards enables the designers and investors to be well versed in current requirements concerning the ventilation from the point of building fire safety securing.

The article explains the principle of air absorption in the water of heating systems. The results are carried through into practical conclusions enabling to specify the volumetric portion of absorbed air at different points of heating systems in dependence on pressure and remperature

The article contains the results of promptness in warmservice water preparation measurements at gas boilers Protherm. Three types of boilers were tested (Panther, Leopard, Tiger) in test room of the firm for two water flow-rates (0,067 and 0,1 kg/s) and two water temperatures (40 and 50 oC).

The contribution deals with possibilities of heating systems circuits connections in connection with control valves, pumps and distributors.

For the testing of distribution piping materials influence on the drinking water quality statistic and dynamic methods are used. Principles of these methods and the result of two specific tests of the development of microorganisms on different materials are indicated. Recommendations for the selection of materials and operation measures for increasing the drinking water quality are deduced from the results of testing.

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The article informs about the basic principles of cooling ceilings functioning. The possibilities of cooling ceilings utilization even for heating are indicated and the basic conditions and regularities of this combined system are formulated.

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