Issue 1/2012

Appropriately designed ventilation equipment ensuring the sufficient outside air intake is sharing the heat loss in the dwelling space. The ventilation air must be heated so that the required temperature of the inside air is achieved, in the winter period. The heating system balances the heat loss when the exhaust ventilation is used; the ventilating balanced system balances the significant portion of the heat loss in the heat recovery exchanger. Use of heaters is not frequent in air handling units however it is possible (e.g. warm air heating). The total energy consumption can be affected with the energy driving fans that may differ according to the chosen ventilation system.

The author mentions the competency of the health protection bodies in the area of the environment quality assessment in apartments and dwelling houses, and summarizes fundamental requirements with respect to the inside environment quality in buildings generally, i.e. legally binding requirements specified in statutes and applicable implementing regulations, in her article.

The author draws attention to the necessity of the right solution of the combustion air supply in consumers using solid fuel, particularly fireplaces. The required volume of the combustion air supply cannot be ensured through the infiltration in buildings with installed tight windows and minimal natural air circulation in window frame gaps. The author shows examples of possible solutions of the combustion air supply for fireplaces.

The Author describes heating and cooling in administrative building of development and structural centre of the firm Velteko that utilizes heat gains from production machinery and technical elements equipping the interior in the dependency to the heat need, in his contribution

Paper informs on new wording of Czech standard ČSN 73 0540–2 Thermal protection of buildings – Requirements from this year and points at changes against original version from 2007. Revision of the standard responds to progress in European standardization and legislation and it has a linkage to revision of decree on energy performance of buildings being prepared.

The author brings the fundamental view concerning the problem of ventilation in residential buildings with respect to the building fire protection, in his contribution. No each designer or supplier of air conditioning systems designed for use in multiple dwelling or family houses is aware of this aspect importance and adheres it in the required level. He introduces interested parties with the substantial requirements that must be solved and taken into consideration, in the article.

The author introduces readers with unsolvable problems that arise at the designing and subsequent assessments of the energy demands of sport facilities in accordance with the Decree no. 148/2007 Coll. The author specifies the detail analysis of the heat consumption according to the utilization (wall heat transfer, ventilating air and hot water heating, lighting, etc.) at the model example of the swimming pool derived from the real object. It is evident from the analysis that the required classes of energy demand for such types of sport facilities cannot be achieved pursuant to the stated decree. The achieved class G of the energy demand is extraordinarily inefficient, without any doubt. At the conclusion, the author specifies possible proposals improving the existing situation.

The combustion air supply from the outside atmospheremust be ensured for the operation of gas consumers (stoves) in kitchens. Newly installed tight windows with minimal natural air circulation in window frame gaps do not ensure the air infiltration supply. Therefore, use of gas consumer increases the demand for the ventilation systems. This problem does not occur at electric appliances.

The article includes a requested reply concerning requirements of the established practice where often occur situations in which the preparation of the investment character construction schemes reflects the ignorance of the investor or its authorized party. The author, who professionally prepares similar constructions, provides advices and instructions of how to conduct and manage the mentioned process and he warns of consequences ensuing from inadequate accesses and circumstances accompanying it in a very accessible way. He draws the attention to the fundamental rules used at the preparation of constructions and mentions of the necessity of the certain level of cooperation related therewith, as well.