These charts use the same vertical scale as the previous pair to simplify comparisons, but differ in that there's no equivalent to the SAX2 parser figure.

These charts use the same vertical scale as the previous pair to simplify comparisons, but differ in that there's no equivalent to the SAX2 parser figure.

They say they can scale it up for use in air conditioning, and aim to build 3.5-kilowatt devices – equivalent to a basic home model – which could be dotted around buildings.