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Posted by -zero on February 22, 2008, 4:54 pm
>I ran into a water heater today looking like it was on steroids.
> Just wondering if anyone else has seen companies in their area doing
> this?
> A 2 yr old 50 gallon gas water heater by Bradford-White. The draft
> hood has been removed and a 4 inch elbow sits right on top. Then A Tee
> fitting with a barometric damper then reduced back to 3" and back into
> a brick chimney on an outside wall with 3 sides exposed to the
> outside.
> They have a 90% efficient furnace so the water heater is the only
> thing in the chimney.
> The water heater has a draft spill switch added just at the top front
> of the barometric and wired to the gas valve thermocouple to break the
> pilot flame circuit.
> Unfortunately this appears to be the brain child of one Jim Davis ,
> somewhat of an excentric on combustion analysis.
> I just dont get why you would want to alter the design of a piece of
> equipment.
> It is evidentially done as an alternative to lining a chimney but
> doesnt always work.
> I can get pics tomorrow if anyone wants to see it.
Sounds like no room for a Vertical Draft Diverter. So, instead
of ordering a Horizontal Diverter, he used a barometric & a T. Not
so big of a deal in a industrial application. But for residential... I
would follow the manufacturers recomendations for a horizontal
diverter.
-zero
> Bubba
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