Next , the UK supermarket chain , is to launch a trial of an “ invisible door ” designed to reduce avoidable energy loss at the entrances in its Berkhamsted shop later this year . Waitrose & Partners joins the likes of Sainsbury’s and Asda in investing in Formula-One-inspired fridge technologies. Research suggests that a widescale rollout of the AirDoor could save retailers in the country an annual £ 1.5bn ( $ 1.9bn ) in energy costs . The AirDoor , developed by Wirth Research and inspired by Formula One racing cars , positions an archway outside the frame of the entrance in order to prevent conditioned air from being lost when the door is opened .
Next , the UK supermarket chain , is to launch a trial of an “ invisible door ” designed to reduce avoidable energy loss at the entrances in its Berkhamsted shop later this year . Research suggests that a widescale rollout of the AirDoor could save retailers in the country an annual £ 1.5bn ( $ 1.9bn ) in energy costs . The AirDoor , developed by Wirth Research and inspired by Formula One racing cars , positions an archway outside the frame of the entrance in order to prevent conditioned air from being lost when the door is opened .