Goodman’s GMH95 95 percent AFUE Two-Stage (Convertible), Multi-Speed Furnace is designed to provide the quiet and comfort of a two-stage furnace at a price competitive with many single-stage furnaces. It features DualSaver™ Two-Stage (Convertible) Technology, which provides self-adjusting low-stage timing for maximum comfort; stored diagnostics (last five fault codes) for easier service; and three fan speeds for quiet, efficient operation.