Rinnai: can Commercial Heat Pumps be used for Domestic Hot Water?

Before we delve into this topic it would be useful to quantify the meaning of domestic hot water.
 
Domestic hot water or DHW is frequently considered as hot water used solely for domestic properties and or dwellings. This is not the case, and its term refers to water used for domestic purposes such as showers, sinks, bathing, and general ablutions so DHW heating. This means that Domestic Hot Water is used in both domestic and commercial premises.