“…Nevertheless, there are serious health concerns associated with PPS water (particularly if contaminated with faecal matter), which could potentially be recycled within buildings for toilet flushing and other applications as discussed by the authors previously. 22 Rationale, aim and objectives Both PPS and GSHP are commercially available applications, but were never used as combined systems in a research project. A combined system has the potential to capture, detain and treat runoff, and to either cool or heat a nearby building at the same time.…”