Solar Hot Water in ApacheHVAC can be used for space heating and/or DHW, but is always located on the HW loop return. This does not, however, negate the use of the separate Solar HW module in Apache Thermal view to first meet DHW load, and thus take advantage of the greater delta-T between main water supply and the solar HW loop for improved solar HW efficiency.
While the DHW-coupled configuration in the ApacheThermal view is the most common for residential applications, commercial applications often have very little DHW demand, and thus tend more often to use the solar hot water for space heating.
