It's impossible to tell where exactly the smoke is coming from; the smell is fairly pervasive, though at least aside from the smell the air seems to be clear.

"Well— I'm not sure what they'd look like to you, actually. But there is one in each room. ...It's less a matter of a clog and more that they've run out of fuel, dear. You might be able to restart them, but without something new to burn they'll likely go right back out."