Combined Heat It has long been established that for high quality combined heat should be applied regulation, which must be a rational combination of at least three levels of central, generic (or local) and the individual. Change heat transfer coefficient is used only when local regulation, in particular, in regulation-tion heat transfer from the convector by changing the position regulating plate. Torye some residents who have installed radiators, close them with blankets at a high temperature of outdoor air. The disadvantage of this method increases the temperature of return water, ie increases the specific (per 1 Gcal of heat transferred to) the costs of energy to drive circulators. For its excess provider penalizes the consumer. At the same time somehow gone unnoticed that the variance of energy to pump heat compared to its costs on the settlement (for the coldest time) mode is a general feature of high-quality regulation. By the way, is not clear how the supplier should do if the temperature of return water is growing in homes, in which the project set coil, ie where This growth is already built into the project. Some suppliers, in practice, with an increase in the return water temperature just lower the temperature of the line compared to the prescribed temperature schedule. Regulation by changing coolant flow rate ('quantitative') suggests at least a 'pure' form of constancy of its temperature, ie the temperature of the water line. Each user transmits so much water in their heating appliances, as he needs to create a comfortable (physically and economically) conditions.
Heat Retention But one of the main functions of the window (along with the transmission of light) - all same heat retention. Of really high quality windows provide improved thermal protection due to important factors such as increased width of the frame and sash, the presence among them at least two circuits seals and sealed windows. In accordance with Russian construction standards, the level of the necessary thermal insulation of windows depends on the exponent degree-day heating season, which is associated with local climatic features. In particular, the conditions of the Moscow region, the drag coefficient of heat transfer window should not be less than 0.54 m2 C / W, and, For example, for the climatic conditions of Novosibirsk - 0,63 m2? C / watt. This figure is the total for the entire window system and, therefore, depends on the rtd as part of the translucent window and profile itself (the frame and wings), and therefore are an important factor is the material of window designs. Today's market offers consumers a great variety of options of modern window designs based on different materials from which the most common wood, aluminum and pvc. At first glance it seems wooden windows the best choice. After the tree has high insulating properties, resistance to frost (which is very important in our climates) and also quite aesthetically pleasing. But all these positive aspects there is a downside. Being quite hygroscopic, the tree strongly depends on the humidity, which can lead to change in its properties is not the best.

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