Chimney diameter/reuse with new fireplace?

[Driven]

Hi all!

I'm looking into replacing my existing heatilator NA42 (?) wood burning fireplace with a Fireplace Xtrordinaire FPX 44 wood-burner.
I see the FPX 44 requires an 8" double wall chimney, specifically, it calls for one of the following: Temco 82 - Firecraft FTF8 (Superior TF8) - FMI 8DM - Marco 8D.

Looking at my existing chimney, I see it's about 10" outer diameter and 8" inner diameter. Does that make it an 8" or 10" chimney? And is it possible to reuse the existing (7 year old) chimney with the new fireplace install?

Thanks!
Dave

 

[Driven]

I swear this isn't a trick question. lol

Is an 8" double-wall chimney section in reference to the diameter of the inner or outer pipe?

 

[cmonSTART]

I'm pretty sure it's ID they are referring to.

 

[fossil]

Sounds like 8" double wall. As to whether or not you can re-use it with the new appliance, that depends upon its current condition and identifying it as one of the new appliance manufacurer's approved systems. Rick

 

[Driven]

Thanks guys. I'm having someone out on Friday to give me an official quote. I'll make sure that I ask them about reuse now that I know it's at least the right size pipe.