The simple answer to this is just by adding a button that’s called ECO; the catch? It’s going to take you 8 hours to dry anything! By which time it’s stopped raining and you could have dried it all outside.
Should this White Knight machine be described as an ‘A’ labelled tumble dryer? We don’t think so, as its normal 2 hours cycle rates it as ‘C’ in Energy Efficiency. Creative copywriting springs to mind.