Hotel Allegra Zurich Switzerland Ionair systems provide "air naturally fresh" for 132 guest rooms, 4 conference rooms, fitness center, 2 restaurants and bar areas. Hotel Allegra has benefited from the use of the controlled ionization system as follows: Neutralization of tobacco smoke and other unpleasant odors or irritants Reduction of airborne microbes and dust particles Savings in operation and maintenance costs because of the reduction in the amount of outside air needed The ionair system has been in operation since 1998 to the complete satisfaction of hotel guests and staff members. back to reference projects

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