Abstract: One disclosed system includes: (a) a fan directing an initial air stream to a heater with sufficient heating capacity to heat said initial airstream to a temperature of 200° C. to 350° C. and output a heated air stream; and (b) an air to air heat exchanger positioned and configured to use said heated air stream to preheat said initial airstream prior to its arrival at said heater. Additional systems and corresponding methods are disclosed.

Abstract: One disclosed system includes: (a) a fan directing an initial air stream to a heater with sufficient heating capacity to heat said initial airstream to a temperature of 200° C. to 350° C. and output a heated air stream; and (b) an air to air heat exchanger positioned and configured to use said heated air stream to preheat said initial airstream prior to its arrival at said heater. Additional systems and corresponding methods are disclosed.

Abstract: A system and a method are proposed for sanitizing air in premises. The system comprises an air compressor for sucking and then compressing the air supposedly comprising noxious and/or allergenic small items up to a denaturing pressure. The system is provided with a controllable pressure tank for denaturing there-inside the mentioned small items supplied with the compressed air. The tank controllably receives the compressed air from the compressor, heats and maintains the compressed air within a denaturing temperature range and discharges the compressed sanitized air to the premises, so that the discharged sanitized air cools down while expanding.

Abstract: A system and a method are proposed for sanitizing air in premises. The system comprises an air compressor for sucking and then compressing the air supposedly comprising noxious and/or allergenic small items up to a denaturing pressure. The system is provided with a controllable pressure tank for denaturing there-inside the mentioned small items supplied with the compressed air. The tank controllably receives the compressed air from the compressor, heats and maintains the compressed air within a denaturing temperature range and discharges the compressed sanitized air to the premises, so that the discharged sanitized air cools down while expanding.