Heat Pump Plus: How to combine an air-to-water heat pump with a boiler (Part II)

摘要

In Part I on page MH4 we discussed the energy concepts involved in combining an air-to-water heat pump (AWHP) with an auxiliary boiler. In Part II we will put hardware together into a complete combi-system for heating and domestic hot water. Since we have the heat pump, we will also include a couple of zones of chilled water cooling. Figure 1 shows the overall piping schematic.