November 28th, 2018
When domestic water is heated indirectly by a space heating boiler, a sizing factor may be used to determine the additional boiler capacity required to meet the recovery demands of the domestic water heating load. Indirect water heaters include immersion coils in boilers as well as heat exchangers with space heating media. Because the boiler capacity must meet not only the water supply requirement but also the space heating loads, the sizing factor indicates the reduction of additional heat supply for water heating if the ration of water heating load to space heating is low.
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