80% Downflow 2 Stage Variable Speed Comm. Furnace (Armstrong/AirEase) Two-stage heating keeps your heat steady and warm. SKU: A80DS2V070A12 EA 70 MBH 80% 2 STG.DOWNFLOW-COM (A80DS2V070A12 )90 MBH 80% 2 STG.DOWNFLOW-COM (A80DS2V090B16 )110MBH 80% 2 STG.DOWNFLOW-COM (A80DS2V110C20 ) Log in to View Price