What's Your Afue? Hub Plumbing And Mechanical Of Boston Explains How It Effects Heating Fuel Costs ... However, the AFUE (annual fuel utilization efficiency) of your furnace or boiler provides the key to how much fuel you’ll burn this winter according to John Wood, founder and CEO of Hub Plumbing & Mechanical of Boston... An AFUE of 90% means that 90% of the energy in the fuel becomes heat for the home and the other 10% escapes up the chimney and elsewhere."...
Those Maine woods differ essentially from ours. There you are never reminded that the wilderness which you are threading is, after all, some villager’s familiar wood-lot, some widow’s thirds, from which her ancestors have sledded fuel for generations, minutely described in some old deed which is recorded, of which the owner has got a plan, too, and old bound-marks may be found every forty rods, if you will search.
—Henry David Thoreau (1817–1862)
Wipe your hand across your mouth, and laugh;
The worlds revolve like ancient women
Gathering fuel in vacant lots.
—T.S. (Thomas Stearns)
How much more interesting an event is that man’s supper who has just been forth in the snow to hunt, nay, you might say, steal, the fuel to cook it with! His bread and meat are sweet.
—Henry David Thoreau (1817–1862)