Bought and installed the Tundra 2 a couple of weeks ago. Got it WETT inspected and it is going. I can go 12 hours on 3 fair pieces of wood and the heat is nice. The one problem I am having is whenever the blower shuts down, there is a banging from the right side of the furnace, annoying to say the least Ordered the air filter kit, which I have now. My next purchase will be a house thermostat, as the old one I have is only 12 volts, and this one requires a 24 volt thermostat. So far I am really satisfied as it burns a lot less wood than my old Newmac!