Shoppers are raving about a 'safe' space heater from Amazon that could save you £1.27 per hour on heating.The ASSCA space heater, priced at £39.99, heats up in just five seconds and has several heating modes.The handy gadget comes with three heat settings, a fan-only mode, and an adjustable thermostat to set your perfect temperature. It also has built-in safety measures, turning off automatically if tipped over more than 45 degrees or if it overheats.