Traditional dehumidifiers consume a lot of electricity to cool air until the water vapor condenses out. Evercloak takes a far more energy-efficient approach. Evercloak’s membranes are so thin — just a single layer of molecules — they’re considered two-dimensional. They’ve designed membranes to be highly selective, letting water molecules pass through while keeping out the other components of air, and then cooling the air down in a two-stage process. Because the membrane is so thin, drawing water through the nano-pores takes very little energy, as does cooling down the dry air. That keeps operating costs – and carbon footprint – impressively low.