Slim Ducts provide an inconspicuous solution, hidden in attics and ceiling crawl spaces, without the energy loss associated with central ducted systems. Slim Ducts offer flexibility of installation as the ducts can be directed into separate areas which are collectively controlled by one wall thermostat. For example, one slim duct can be directed to cool and heat hallways, closets, laundry rooms, and bathrooms of a home while the bedrooms themselves are controlled independently. Slim Ducts are available in 9K, 12K, 18K, 24K, 36K, 48K, and 60K Btu/h models.