Perfectly working Lennox G16 natural gas furnace with 75K BTU input / 61K BTU output. Was just removed from service yesterday (we got a heat pump with A/C). See pictures showing bright blue flames, taken just before we shut it off. This is a tried-and-true induced-draft 80% AFUE model with an easy-to-connect 4" metal exhaust duct. Updraft / upflow type, with large basket filter allowing nearly any type of filter media (we used Filtrete MERV 8) and a new RobertShaw ignition control box ($135 by itself!). Great heating source for your workshop or garage or cabin. $200, easy pick up in Seattle near I-5 and Aurora/99. Could possible deliver nearby, after you inspect and pay for it here. Feel free to ask any questions you have.