The templates consists consist of various configurations with HIU’s.
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The system represents a small appartment apartment building with 8 appartmentsapartments, 4 of which have radiator heating (left) and 4 have floor heating (right). A boiler with a large water content is used, because the flow through the boiler is variable and can be nearly zero. More information on concepts for large or small water content can be found in Boiler. Every appartment apartment has HIU’s for DHW and have a has an ecodesign tap profile. The boiler has a constant boilertemperature boiler temperature of 75°C. For DHW diversity rates are calculated to minimise the oversizing of every component. More information on diversity calculations can be found in Satellite units and simultaneous flows.
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This template is similar to the previous template “HIU - Boiler - Large water content”, except for the small water content boiler. Because of the small water content boiler, an open a low loss header is used. More information on concepts for large or small water content can be found in Boiler. The boiler has a constant temperature of 75°C, except if the return temperature is lower than 75°C. If the return temperature is lower, the boiler temperature is the sommation summation of the return temperature and 15°C, because small water content boilers typically have a constant temperature difference between the ingoing and outgoing temperature.
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