Too much bias and inaccuracies in that article to even comment on. The guy
is going only by his personal experience, and using emotion, which should
never come into play when picking a system.

"buffalobill" wrote in message
ups.com...
not on your older furnace. it doesn't burn clean enough. and it
routinely requires a hot exhaust updraft discharge up a chimney to
specified feet above the rooftop.
you're probably looking at a 99 percent efficient combustion of gas on
those pvc ground level flues.
i searched google for "high efficiency oil heat pvc flue"
and came across a good article about how much maintenance they save
with a change:
http://www.hammerzone.com/archives/h...ermination.htm