Furnace flue bends

[Jeff Beck]

Why would you do this?

2005 Ameristar furnace, 60,000 input btus, the flue goes through an unheated attic space into one of those fake brick (metal) chimney chases.

I thought it might be to prevent condensation from draining back into the furnace. But the bends in the flue could slow down the draft to the point of cooling before it exits the chimney and actually cause more condensate to form.

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Thanks,

Jeff

[Terence McCann]

They put the 90's in for filter access. B vent in the attic? One other thought... everything looks a little cramped in there, is there enough combustion air?

BTW, I like the duck.

[Jeff Beck]

Slaps head and says, "Oh what a dummy am I!" [:-paperba

I actually showed the client how to change the filter and it never occurred to me that was why the 90's were there.

It's been a long day.

Couldn't get access to the attic in that section so I don't know if it's a B-Vent.

I measured the room and there is enough combustion air. This is a 75 year lake house with a view of the lake to die for, but I don't think the clients wanted to go that far. []

Jeff

[hausdok]

Couldn't get access to the attic in that section so I don't know if it's a B-Vent.

Jeff

Could you not see the bottom of the B-vent at the ceiling thimble and see the other end of it protruding from the roof when you inspected the rooftop?

ONE TEAM - ONE FIGHT!!!

Mike

[Nolan Kienitz]

BTW, I like the duck.

It's a "Watch Duck" [:-slaphap

[Darren]

If that's the filter, then that's a return register just above a water heater draft hood, no?

That would be a no, no.

I have a seminar booklet that states "One 90 degree offset is permitted when using the new vent tables." I need to do further research on that.

[Terence McCann]

If that's the filter, then that's a return register just above a water heater draft hood, no?

That would be a no, no.

I have a seminar booklet that states "One 90 degree offset is permitted when using the new vent tables." I need to do further research on that.

Good eye Darren [:-magnify

[Tom Raymond]

They put the 90's in for filter access. B vent in the attic? One other thought... everything looks a little cramped in there, is there enough combustion air?

BTW, I like the duck.

A little cramped? That's funny[]