Until 2006, METRAX GmbH, based in D-78628 Rottweil produced and sold whirlpool blower. We bought all the technology, Know-How, and all manufacturing and production machines in early 2006 from METRAX GmbH. Since May 2006 our company SPATECH GmbH produces these hot tub blowers and accessories for the worldwide spa industry. All hot tub blowers sold until 2006 by METRAX. are identical and can be replaced one-for-one. On top we built additional performance versions to meet the overall requirements of the market. For questions about our hot tub blowers you can contact us at any time. We will be happy to give any kind of advice!