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Se incluyen instrucciones en Espanol y Frances. Directives en francais et en espagnol compris. LU ®CLU ® SAVE THE ENVIRONMENT RECYCLE APPROPRIATE MATERIALS Patents: 5,037,583; 5,110,511; 5,133,904 Other Patents Pending Printed in U.S.A To order parts and accessories call 1-800 547-3888 586 4180 Rev.5/04 Introduction Today, airtight homes have helped conserve energy compared to just a few years ago. Unfortunately, along with this improvement came an increase in indoor pollution and contaminants.