magnaflex offset box

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m0jumb0

New Member
Aug 1, 2008
109
Middle TN
I have a hearth mounted 13-nc that's crammed all the way into the fireplace. I have a stainless flex liner, and I'm interested in moving the stove out of the fireplace slightly so that I can mount a blower on the back to utilize a little more of the heat that's going into heating my chimney and not the room. I was thinking about using one of these magnaflex offset boxes, but it doesn't give me enough details to evaluate whether it'll work in my situation. Does anyone have any experience with these? What are the dimensions of the box itself? I only have about 2" clearance between the top of the stove outlet and the bottom of my fireplace opening (lentil?), so I'm not sure if the box would even clear.

update forgot to include a link to the offset i'm talking about: http://www.northlineexpress.com/itemdesc.asp?ic=5MG-MSS-OSB-6

I'm looking to replace this black coupler with the stainless offset box...
pict2509.jpg
 
m0jumb0 said:
I have a hearth mounted 13-nc that's crammed all the way into the fireplace. I have a stainless flex liner, and I'm interested in moving the stove out of the fireplace slightly so that I can mount a blower on the back to utilize a little more of the heath that's going into heating my chimney and not the room. I was thinking about using one of these magnaflex offset boxes, but it doesn't give me enough details to evaluate whether it'll work in my situation. Does anyone have any experience with these? What are the dimensions of the box itself? I only have about 2" clearance between the top of the stove outlet and the bottom of my fireplace opening (lentil?), so I'm not sure if the box would even clear.

I'm looking to replace this black coupler with the stainless offset box...
pict2509.jpg
Click to expand...

Will something like this work? They can build one for you. This one has the dimensions.

url http://www.chimneylinerdepot.com/store/comersus_viewItem.asp?idProduct=64
 
yeah, that's like what I had in mind, though at 3" high on the box, that won't work for me... I have a suspicion that the one I posted is the same height.
 
m0jumb0 said:
yeah, that's like what I had in mind, though at 3" high on the box, that won't work for me... I have a suspicion that the one I posted is the same height.
Click to expand...

The one you posted has the spc. at 6" Diameter
Extends from 15" - 21"
316 TI Stainless Titanium Steel
1" air space clearance to combustibles
Designed for wood or coal stoves
Total height of box is 8 1/8" I don't know if this includes the measurement from the pipe extensions or the box. You might want to call the toll free number for the one I posted and see if they can narrow the top section down and maybe widen the box for volume for exhaust flow. The bottom has the slider pipe assembly in it to close off the gap when you adjust it. Or you can make your own blower system like I did if this is a stove with legs on it. Cost about $ 40. My stove sat just like yours is now.
 
Can you drop the legs on the stove (and use a heat shield) to gain some clearance?
 
Wet1 said:
Can you drop the legs on the stove (and use a heat shield) to gain some clearance?
Click to expand...

That thought has crossed my mind.. I have the cast iron legs that came with the stove in a box somewhere. I'm currently using the pedestal. I'm just a little wary of modifying the stove :/
 
I actually think the legs make it sit a little lower. at least it seamed that way when I switch mine, I have not actually measured the difference tho
 
seems like the manual said they were the same... i wish englander made a similar model with a rear-exit. that would solve all of my problems.

anyway, magnaflex contacted me and offered to make a custom box, so i'm going to get some detailed measurements of my situation and probably go this route
 
I'd think any offset box that would fit that space will end up being too restrictive. I'd live with it, drop the stove, or replace it with something designed for that application.
 
Wet1 said:
I'd think any offset box that would fit that space will end up being too restrictive. I'd live with it, drop the stove, or replace it with something designed for that application.
Click to expand...

yeah i'm concerned about that too. you think even with widening the box to compensate for being thinner that it would still be too restrictive? really, lowering the stove would be easier and cheaper than getting a custom box made. i guess i just needed to hear someone else say it too. the stove is sitting on concrete and brick all the way to the ground, so I'm not really worried about bottom clearance.
 
I'd lower it and put a heat shield under it to minimize heat loss through the brick/concrete... assuming you're hell-bent on going this direction.
 
Wet1 said:
I'd lower it and put a heat shield under it to minimize heat loss through the brick/concrete... assuming you're hell-bent on going this direction.
Click to expand...

Well I'm not hell-bent on anything in particular, that's why I'm asking for suggestions :)

Lowering it does sound like the best option though. Then the stock offset box clears and I can get my blower in there and add some heat shielding.
 
PunKid8888 said:
I actually think the legs make it sit a little lower. at least it seamed that way when I switch mine, I have not actually measured the difference tho
Click to expand...

You're right, when I turned the stove over and held up the legs they're an inch shorter than the pedestal. Wish I would have known this last year! Would have made my life easier. Anyway, between this and shaving an inch off the inlet flange of the offset box, I'm going to be able to get it in there. I'm waiting on a new collar plate for the top of my chimney, and a new nylon brush and then I'll be in business.
 
Ok, I ended up getting the stock magnaflex offset box and later ordered a new flue tile cover and rain cap for my setup. I would recommend magnaflex to anybody, they've been a joy to deal with. Very responsive, good prices and fast shipping. I got everything set up this evening and I'm having my first fire of the season tonight. Looking forward to 24/7 burning season! :)
 
Pictures please!

Shari
 
What are the dimensions of the box from magnaflex HxWxD? I'm going to get one from him also and wanted to know the dimensions and how much it actually offsets. Thanks.

m0jumb0 said:
Ok, I ended up getting the stock magnaflex offset box and later ordered a new flue tile cover and rain cap for my setup. I would recommend magnaflex to anybody, they've been a joy to deal with. Very responsive, good prices and fast shipping. I got everything set up this evening and I'm having my first fire of the season tonight. Looking forward to 24/7 burning season! :)
Click to expand...
 
THEMAN said:
What are the dimensions of the box from magnaflex HxWxD? I'm going to get one from him also and wanted to know the dimensions and how much it actually offsets. Thanks.
Click to expand...

This should help:

3320.jpg
 
Can't say if it would work, but I would contact Magnaflex here on the forum. Rainer can probably tell you if it will do what you want and maybe give you a better price direct.
 
Berone said:
Can't say if it would work, but I would contact Magnaflex here on the forum. Rainer can probably tell you if it will do what you want and maybe give you a better price direct.
Click to expand...

not only that, but he can make custom sizes if you need thinner or more offset than the stock one provides
 
m0jumb0 said:
Berone said:
Can't say if it would work, but I would contact Magnaflex here on the forum. Rainer can probably tell you if it will do what you want and maybe give you a better price direct.
Click to expand...

not only that, but he can make custom sizes if you need thinner or more offset than the stock one provides
Click to expand...

Although I like the sound of custom. I think that the stock one may work. I only need around 3 1/2" of offset so, if I'm correct the minimum of the stock one is 6" so that should do fine. Now the thickness of the the actual box is only 3" or so doesn't that cause some restriction of draft since the air/smoke comes up through the flue into a hard immediate 90 degree turn then up the pipe? I wonder if a taller box would remedy that, if it is a problem that is.
 
THEMAN said:
Although I like the sound of custom. I think that the stock one may work. I only need around 3 1/2" of offset so, if I'm correct the minimum of the stock one is 6" so that should do fine. Now the thickness of the the actual box is only 3" or so doesn't that cause some restriction of draft since the air/smoke comes up through the flue into a hard immediate 90 degree turn then up the pipe? I wonder if a taller box would remedy that, if it is a problem that is.
Click to expand...

as far as restriction goes, I can't really tell. seems to draft just as well as when i just had a straight connection to my liner. certainly that's not the case, but if you have great draft now and a straight run you shouldn't notice too much of a loss
 
m0jumb0 said:
THEMAN said:
Although I like the sound of custom. I think that the stock one may work. I only need around 3 1/2" of offset so, if I'm correct the minimum of the stock one is 6" so that should do fine. Now the thickness of the the actual box is only 3" or so doesn't that cause some restriction of draft since the air/smoke comes up through the flue into a hard immediate 90 degree turn then up the pipe? I wonder if a taller box would remedy that, if it is a problem that is.
Click to expand...

as far as restriction goes, I can't really tell. seems to draft just as well as when i just had a straight connection to my liner. certainly that's not the case, but if you have great draft now and a straight run you shouldn't notice too much of a loss
Click to expand...

I don't have anything now. I'm going to install my first wood burning insert. I plan on doing a direct connect for now(due to $) which from what I have read here is not the most efficient way of creating a proper draft. I need the offset to be able to make it past the damper handle that I want to save, so that in the future I can remove the stove and leave a fully functional fireplace. I just want to make it so that I can have the best draft available with what I have to work with. Not to mention that I may have to reduce the stove flue from 8" to 6" to get the pipe past the 5" damper.
 
How does that stove heat for you with it in the fireplace? I am thinking of doing the same thing with mine with the same stove. Did you have to cut the damper?

Thanks

Anthony
 

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