Just having graduated from England’s Cambridge University, Frank Hammes, Klaus’ son, decides to join the family business. Having grown up with air purification all his life, he shares his father’s passion for clean air. After successfully promoting, a cabin air filter for Mercedes-Benz automobiles in North America, Frank turns his attention to fan powered room air cleaners. What he finds is a large discrepancy between consumer room air purifiers and large commercial air cleaning systems. While the commercial systems are large and expensive, they are also very effective. The smaller consumer room air purifiers on the other hand turn out to be ineffectual. The decision is made in 1994 to develop a new kind of air cleaning device. It would take Frank and a team of Swiss and German engineers four years of intensive research and development to build the world's most effective line of compact air purifiers.

In the spring of 1998, the first IQAir system rolls of the new production line of the Swiss factory. Initially only available in Europe, the HealthPro Plus receives its first major recognition in September of 1998. Europe's leading product testing organization, Stiftung Warentest, finds the HealthPro Plus to outperform all its competitors in one of the most comprehensive air purifier tests ever devised.

In 2000, IQAir air purifiers finally become available to the United States. They become an instant success with allergy and asthma sufferers.