(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.
If you have natural gas, there are gas-powered air conditioning units that use a no-compressor absorption process. These also heat your house in the winter. Another super-efficient gas central air conditioning and heating unit uses a compressor. With an equivalent SEER of 27, it can cut cooling costs by 75%.