Nordyne Gad Furnace Model: FG6RL 100C-16B. Downflow, 100,000 btu, direct or non direct vent, 92.1 AFU which means 92.1% of the energy consumed by unit is converted to heat...or 92cents of $1. I dont think its ever been hooked up and if it was its still in great shape. Has some cosmetic scratches and "dings" but nothing major and does not effect its functionality. Price may be negotiable