What about fans ?
Some fans also work as cooler when equiped with water mist system, since water while evaporates take heats off. But it only works reasonable in very dry weather
I don't use air conditioned, I use a fan on my side during hot weather.
Why americans are so adicted to air conditioned ?
For cold, people could use clothes for cold weather, insted of warm the home interior up to use light clothes. But I know some countries are so cold in winter that home needs warming system at least in some degree.