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Predesign of capacity of a copper
According to building norms and rules 41-01-2003 heating should be designed to ensure, in indoor design temperature of air, given:
- heat flow, regularly coming from electrical appliances, lighting, process equipment, communications, materials, people and other sources, and the heat flux entering the room and the kitchen houses should receive no less than 10 watts per 1 square meter of floor;
- heat loss through the inner walling of premises is not permitted to consider if the temperature difference in these rooms is 3°C or less.

Windows:
Wall:
Area ratio of windows and floors:
The temperature outdoors, K:
Number of walls that go out:
Type of premises over the computed:
Ceiling height, m:
The need for hot water:
Floor area, m2:
Heat loss, kW:
The required capacity of the boiler, kW:


Source: Designing Gas [http://www.proekt-gaz.ru]
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