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Posted by on May 20, 2007, 11:53 pm
> >> > For the guys that *think* moisture can't migrate into an air
> >conditioning
> >> > system unless the system operates under a vacuum.
> >> > Do you think an induced draft furnace 'with a cracked heat exchanger'
> >can
> >> > introduce CO in your airstream?
> >> > As per your thinking, the supply ducting is under positive pressure,
the
> >> > heat exchangers are under a slight vacuum. It should be transferring
> >> > indoor
> >> > air to the exhaust airstream. So how the hell does CO enter into the
> >> > indoor
> >> > airstream?
> >> > Please explain why one is different than the other.
> >> Real simple, furnaces only have a Delta P of an inch or 2 of WATER
COLUMN,
> >> not over 50 POUNDS PER SQUARE INCH(LPCO setting) or higher.
> >The pressure is *still* higher. So the end result is the same no matter
how
> >you slice it.
> >> FWIW, the furnaces I have found with compromised HX, have symptoms of
> >blown
> >> out pilots, tripped roll out switches, and carboned up fire boxes, not
CO
> >in
> >> the airstream.
> >So, are you saying it isn't happening?
> >> Like I said in the other thread... SHOW ME where moisture at ambient
> >> pressure can get into a refrigerant system that has a minimum SP of
50PSI,
> >> with just a very small leak(a couple of ounces per year)...
> >The 50 PSI is irrelevent, venturi effect doesn't care what pressure
you're
> >dealing with. The POE oil is going to suck up the moisture like a sponge.
> >Ever used a nitrogen sludge-sucker?
> sounds like a bottom feeding fish in Lake Michigan......
I believe that's what carp are for or is it the catfish and bullheads?
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> system unless the system operates under a vacuum.
> Do you think an induced draft furnace 'with a cracked heat exchanger' can
> introduce CO in your airstream?
> As per your thinking, the supply ducting is under positive pressure, the
> heat exchangers are under a slight vacuum. It should be transferring
> indoor
> air to the exhaust airstream. So how the hell does CO enter into the
> indoor
> airstream?
> Please explain why one is different than the other.