A stationery factory uses compressed air to inflate the packaging of its stationery sets before they are shipped. The factory's energy manager has noticed that the generation of compressed air accounts for 45% of energy use in the factory. The factory owner is very upset about this and has instructed the energy manager to make changes to the system so that this percentage decreases significantly. What would you recommend the energy manager to do to reduce energy costs in the compressed air system? Be sure to provide at least five recommendations. (Max. 200 words, bullet point format is allowed)