Heating

All air conditioning (cooling) equipment uses energy to work, it's just that now we use electricity. Instead we can use solar hot water. I have the link to this company after finding them through the Solar Decathlon, Rotartica http://www.rotartica.com/ . They build such chillers. I've also seen equipment that will, at night when electricity is cheap, cools a large block of something and then pushes the energy in house back into it during the day.