You don't state what the furnace is, but my coal experience was in an antique cast iron woodstove. (The stove was designed to use either wood or coal). Coal was available from Ossipee Energy.
Anthracite coal is a little difficult to start (use wood-charcoal only to start it) and, compared to seasoned wood, puts out A REALLY HOT HEAT!
It's only because it thoroughly baked the living room, that I returned to burning wood.
It seemed clean enough in every respect, though.
|