New technology can heat and cool your house using nothing but air - ISRAEL21c

Sounds promising!

Very interesting form of technology Lt Col Charlie Brown

Not sure if I understand how it works. It seems like it is about humidity whether warm or cold . . . and collecting condensed water in the walls.

"silica gel or wood wool insulation absorb humidity especially well, Zchor says. When the air subsequently evaporates, it absorbs energy and cools the building.
When temperatures are cooler, cold and humid air is brought in; as it’s absorbed, it warms the air, heating the home or office."
It is very possible I do not understand how it works based on the description, but it seems the difference is that water condenses from humidity (whether it is hot or cold) and is stored in the walls.

Though more high tech . . . it seems to work on the same principle as our, "evaporative coolers" (swamp coolers) . . . However "work" is theoretcial in humid weather!