Originally Posted by Tim D
Mine is floor level to the left of the bathroom door.
Again, if the detector is floor level it is most likely the LP detector since propane is heavier than air. That is also why the LP tank compartment has no bottom. On a side note, on newer models, the LP detector is also wired into the LP regulator. My LP detector failed, so I thought I would simply disconnect it until I got home, but that kept the regulator from working, so I had no propane for the furnace or water heater. Plugged it back in and everything worked fine.