1. AS1056.4, 1997. Storage water heaters, Part 4: Calculations of energy consumption
2. AS4234, 1994. Solar water heaters––domestic and heat pump––calculation of energy consumption
3. C745-00, 2000. Energy efficiency of electric storage tank water heaters and heat pump water heaters. Canadian Standards Association
4. Charters, W.S, de Forest, L, Dixon, C.W.S., Taylor, L.E., 1980. Design and performance of some solar boosted heat pumps. In: ANZSES Solar Energy Society Annual Conference, Melbourne
5. ISO 9459-1, 1992. Solar heating––domestic water heating systems. Performance rating procedure using indoor test methods. International Standards Organisation, Geneva