On Sun, 27 Jan 2019 at 09:44, James Cameron wrote: (The drains are of great interest to kangaroos, wallabies, birds, wasps and bees. One is a favourite of the bees; they are lined up side by side, taking turns, about twenty of them at a time, and there's a flight path off into the forest.) Photos please !!!! I'd look at the possibility of using evaporative cooling in parallel to the air conditioners. If you can evaporate liquid water and then vent it outside you should get net gain. fwiw Thermal energy storage in water is ~=3D 850 litre.degrees-C per kWh. If you are using solar power for the energy source then you can get a useful % mo by cooling the panels below usual sorts of Tpanel. A film of water running down the outer face works. You MAY be able to implement a crude very-large and useful Vuilleumier machine or a Gifford-McMahon machines, using the house for the air spaces. VM: move air between hot space and medium space. Pressure swings are used to Stirling cycle pump a cool space. NO mechanical compression of air - just air movement. GMM: Cycle system pressure to nsuck heat into cooler and then drive it out. Russell > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .