I have a Lennox G12Q4-110-7 (no E in the model #) Category 1 Central Furnace.
I noticed last night that water was all over the place under this unit. I appears to be coming from the top of it. I seems as if the unit is sweating profusely. I went outside to check the drain and it is, in fact, draining. Where is all the water coming from and why so much all of the sudden?