Products are designed with exacting specifications and innovative features and are easy to access and service for better long-term performance and a longer life. Gold XI has upflow and downflow models. Heavy steel insulated cabinet is durable, quiet, and holds more heat in the furnace to better warm a home. The AccuClean whole-house air cleaner provides advanced air filtration that removes more dust, pollen, and other irritants from conditioned air for a cleaner, healthier, more comfortable home.