I guess... there's only two adults in the house here, and a 2000 sq ft house with two heating/cooling units (up/down) and relatively modern windows/sealing.
I think this month will be 1200, and I think we'll have a couple more 1000-1200 kw/h months up ahead.
2) at least one house in Pittsburgh that runs a few GPU servers for its owner's startup. ;) (not quite 4000, but over 3000 this month including our normal use and ac)
I think we use around 700-1000/month most months. who is using 4000/month?