KleenAir NOxMaster System Receives New UK Government Grants

    IRVINE, Calif.--May 14, 2002--KleenAir Systems Inc. (OTCBB:KAIR), announces that it's NOxMaster(R) NOx Reduction System has been selected for two additional UK Government funded Test and Evaluation Programs. Increasing concern is being focused on the health hazards of NOx, particularly in its most virulent form of NO2, a by-product of Diesel Particulate Filters (DPF).
    The first program involves testing the KleenAir Selective Catalytic Reduction (SCR) system on trash collection vehicles in London. These have a particularly problematic stop-and-go duty cycle, which may make it difficult for particulate filters to achieve their regeneration temperatures and have already been installed on many trash collection vehicles and buses in London.
    The Company's bolt-on system fits on the vehicle exhaust system downstream from other devices and cleans up the NOx being emitted by these devices and the engine itself. The NOxMaster(R) NOx Reduction System has been road tested on a refuse collection truck and a 16 passenger Mercedes Benz Sprinter bus in the Borough of Hounslow since the end of last year, and is in the process of being installed on similar vehicles in several other London Boroughs.
    The second program involves testing the KleenAir SCR system on small buses carrying from 16 to 30 passengers such as shuttle and school buses in London. Local authorities use many of these size buses for transporting the elderly and disabled within their boroughs under their welfare assistance programs. Under the new UK Air Quality Management Area NOx reduction targets, these authorities are under considerable pressure to reduce NOx emissions in their districts.
    Road trials are continuing on a number of London taxicabs under a previous grant. That program is entering its mid-term phase with additional emissions testing at the Millbrook Proving Ground. The final phase is now expected to be completed by September.
    KleenAir has a unique computer controlled ammonia system, the NOxMaster(R), which, when injected into the exhaust stream, interacts with NOx produced during combustion. The result converts environmentally hazardous NOx into harmless nitrogen and water. In addition, the Company's catalytic converters significantly reduce particulates as well as hydrocarbons (HC) and carbon monoxide (CO). These pollutants have been shown to be a major contributor to heart and lung disease.

    Safe Harbor Act Disclaimer

    The statements contained in this release and statements that the company may make orally in connection with this release are not historical fact and are forward-looking statements within the meaning of the private securities Litigation Reform Act of 1995. Actual results may differ materially from those forward-looking statements, as such statements involve risks and uncertainties that could significantly impact the company's business and the actual outcome and results may differ materially.

    Note to Editors: In "NO2" the "2" is subscript.