Alfred Kärcher GmbH & Company has sued Tennant Company over claims made about its ec-H2O cleaning technology, but Tennant President and CEO Chris Killingstad called the accusations “baseless” and said his company will vigorously defend itself, its technology, and its advertising.

A German competitor of Golden Valley-based Tennant Company said last week that it had filed lawsuits against Tennant, claiming that the company has made false and misleading advertising claims for its water-based cleaning technology.

But Tennant on Monday stood behind its ec-H2O technology and refuted the claims-which were made by cleaning equipment giant Alfred Kärcher GmbH & Company in lawsuits filed in Germany, Belgium, and the United Kingdom. From TwinCities Business.