(Redirected from EFI System partition) The EFI system partition (ESP) is a partition on a data storage device (usually a hard disk drive or solid-state drive) that is used by computers adhering to the Unified Extensible Firmware Interface (UEFI).
As much as 80 to 90% of the electrical energy used by an air compressor is converted to heat. A properly designed heat recovery unit can recover 50 to 90% of this heat for heating air or water.
1 A basic portable air compressor with a 15-30 gallon tank, 1-2 horsepower (HP), and 120-200 pounds per square inch (PSI) output costs approximately $250 to $500.  A portable air compressor with a 6.5 HP gas engine, 10 gallon tank, and 135 PSI might cost roughly $750 to $1,250.