"Bubba" wrote in message
news
On Sun, 17 Feb 2008 19:31:01 -0800, "Bob F"
wrote:


"Bubba" wrote in message
. ..
On Sat, 16 Feb 2008 00:02:33 GMT, "clint"
wrote:

I have a 90%+ gas furnace that is vented with pvc pipe. We moved into a
development 6 years ago. In the 2nd year there were 4 homes on our street of
8 homes that lost their heat due to snow that blocked the intake pipes. In
all of the failed cases the intake and exhaust pipes were only 10 to 12
inches above the ground. I got the installation manual that was attached to
the return duct on our furnace and it stated that in areas of significant
snowfall the pipes (both intake and exhaust) should be extended to a height
of 12 inches above the maximum anticipated snowfall. It showed how an 90
degree elbow should be placed where the pipes exit the building and pieces
long enough to gain the necessary height placed into that elbow with another
90 degree elbow placed at the top pointing away from the building. Then a
short piece of pipe placed into those elbows. Then a reducer and a smaller
pipe was to be installed at the end of the exhaust pipe so as to create
enough back pressure to expel the exhaust gasses away from the house and the
intake pipe. The intake pipe had an additional elbow pointing down toward
the ground. Then after all that is done the exhaust should be insulated and
covered or painted to prevent UV damage.
Fortunately the hack that was installing the furnaces (108 of them) was
still working in the development and after a considerable amount of pressure
he finally extended all of the ones that were too low. I was going to take
him to small claims court and pay to have the pipes extended but what
finally got him to relent was that the pipes were a code violation. Whenever
a code says to follow the manufactures directions then those directions
become a part of the code for that particular item.
Watch for distances from windows and other exhausts. (water tank and drier
vents)
Hope this helps. Clint Stoner

You havent said a thing that isnt in the installation instructions of
every furnace.
Other than the blithering part about sueing someone.
Bubba

And you know for sure that the O.P. has and has read the manual?


I dont even know if the O.P. can read, Bob. Do you?
Bubba

No, but I do know that the reply you criticised made some very good points.