I have a large old chimney that is the chimney for my house's old cook
fireplace. For efficieny purposes, I would like to do the following: I
want to insert a dual flue stove pipe from the first floor at the top of
the cook fireplace to the roof (two story house with attic). I would
like to install a woodstove in the cook fireplace on the first floor and
use the woodstove on the second floor accessing the second stove pipe
(chimney already has an access hole on the second floor). The reason I
want to run the double pipe all the way down to the first floor even
though the second stove is on the second floor is that I think it will
make cleaning the second pipe easier if I can access it from below. I
would just need a T joint on the second floor for the exhaust from the
second floor stove.

My questions:

1) Is this a feasible setup?
2) If yes, what sort of pipe do you use in a chimney like this?
3) Are there double pipes already joined like this?
4) Will there be any problem with back drafts from the second floor
stove's smoke going up the pipe but then back down the other pipe when
the first floor stove is not in use?
5) Would I need a "damper" (not sure if that is the right term for a
pipe)for each pipe to prevent back drafts when one stove is not in use.
6) Can the stove pipe be "hung" from the top of the chimney with some
sort of mount at the top of the chimney?

Thanks in advance for any information on these questions.

Rob

"Rob" wrote in message

My questions:

1) Is this a feasible setup?

I think so, but have a couple of questions. If i'm reading this right, you
are running one stove on one pipe. The second pipe will run down to the
first floor, but is closed off. There will be a cleanout to open when
needed right?


2) If yes, what sort of pipe do you use in a chimney like this?

Steel stove pipe is the most common, but depeding on the condition of the
existing chimney, you may want to consider mulit-walled pipe. Talk to your
local stove dealer.

3) Are there double pipes already joined like this?

Never saw them, but that does not mean they don't exist.

4) Will there be any problem with back drafts from the second floor
stove's smoke going up the pipe but then back down the other pipe when the
first floor stove is not in use?

You meat crssing over at the top, outside the house? Unlikey, but anything
is possible under the right circumstances. Dual chimneys are fairly common
though.

5) Would I need a "damper" (not sure if that is the right term for a
pipe)for each pipe to prevent back drafts when one stove is not in use.

If the stove is close up, a damper is not really needed. OTOH, it can be a
good iea as downdrafts are farily common under the right conditions.
Usually, it is just a disk in the pipe rotated by a handle outside the pipe.

6) Can the stove pipe be "hung" from the top of the chimney with some sort
of mount at the top of the chimney?

I think you want something under it to hslp keep it in place. I'd not trust
a hanger for that much pipe.

Edwin Pawlowski wrote:
"Rob" wrote in message

My questions:

1) Is this a feasible setup?


I think so, but have a couple of questions. If i'm reading this right, you
are running one stove on one pipe. The second pipe will run down to the
first floor, but is closed off. There will be a cleanout to open when
needed right?

Yes, that was my thought. The second one will go down to the same base
level as the other one, but only for purposes of access for cleaning it.


2) If yes, what sort of pipe do you use in a chimney like this?


Steel stove pipe is the most common, but depeding on the condition of the
existing chimney, you may want to consider mulit-walled pipe. Talk to your
local stove dealer.


3) Are there double pipes already joined like this?


Never saw them, but that does not mean they don't exist.


4) Will there be any problem with back drafts from the second floor
stove's smoke going up the pipe but then back down the other pipe when the
first floor stove is not in use?


You meat crssing over at the top, outside the house? Unlikey, but anything
is possible under the right circumstances. Dual chimneys are fairly common
though.

That is what I meant. I was just concerned because I get downward winds
on the house from the nearby mountains...


5) Would I need a "damper" (not sure if that is the right term for a
pipe)for each pipe to prevent back drafts when one stove is not in use.


If the stove is close up, a damper is not really needed. OTOH, it can be a
good iea as downdrafts are farily common under the right conditions.
Usually, it is just a disk in the pipe rotated by a handle outside the pipe.


6) Can the stove pipe be "hung" from the top of the chimney with some sort
of mount at the top of the chimney?


I think you want something under it to hslp keep it in place. I'd not trust
a hanger for that much pipe.


Thanks for the feedback!

Rob