The Best Air Coolers to Chill Your Home During UK Heatwaves – Tested As the UK swelters in heatwaves, evaporative coolers are being touted as a more energy efficient alternative to air conditioning.
However, their supposed benefits need closer examination. Evaporative coolers work by pulling warm air through water soaked pads, which cools the air down by a couple of degrees at most.
This is a far cry from the refrigerated bliss of air conditioning. While they are indeed more energy efficient than ACs, they're still a significant drain on resources.