Having been involved in local exhaust ventilation for many years, the founders of Tempest-one Ltd. found they had a shared passion for the control of hazardous substances to health (COSHH). Both of the founders have progressed through the British Occupational Hygiene Society (BOHS) LEV training to achieve the Certificate of Competence (CoC), currently the highest level achievable within the field, and were the 2nd and 3rd LEV engineers to be gain the certificate.