Goodman furnaces heat air and distribute the heated air through the house using ducts without making any hustle or bustle. Goodman GMEC960402BN Upflow/Horizontal Two-Stage Gas Furnace has a quiet two-speed induced draft blower. Its two-stage gas valve provides quiet, economical heating. The self-diagnostic control board helps with constant memory fault code history output to an LED. It features low continuous fan speed options to offer quiet air circulation. This 40k BTU/hr Input BTU Natural gas furnace is easy to install with top venting and optional side venting.