6" triple wall insulated pipe inside of 10" fireplace pipe or 6" flex liner?

[Freakingstang]

My wood stove insert requires a 6" flue. My fireplace is a 10" double wall pipe. Local stove shop quoted me an insert and 6" SS flex as the whole liner. They said to install insulation at both top and bottom to seal off the gap. this is the cheapest route as the 15' of flex liner is approx 400 bucks with all the supplies, insulation etc.

Now my question is, since that above scenario sounds a bit hokey to me, and I'd like the best efficiency out of my lopi insert, and want the least amount of creosote. My thinking is that more creosote would build up in the flex liner than the solid pipe. The couple different 6" triple wall SS pipes I've measured are 8 1/2-9" OD. Would I be better off installing the 15' +or- feet inside the 10" double wall fireplace vent. It already has the proper and approved ceiling connections. How would I support the 6" triple wall inside of the 10"?

Any reccomendations from the experts?

 

[Freakingstang]

Also, since i've found some 6" triple wall Duravent pipe for next to nothing, what kind of adapter do I need to install that pipe to the insert connection? or do i use a short piece of flex pipe to connect the two?

 

[woodguy105]

* DISCLAIMER: I'm no expert*

6 inch stainless flex INSIDE a double wall 10" chimney with insulation sounds fine to me almost over kill as you already have a a structurally sound double wall chimney. The extra insulation will only help. Straight pipe with insulation would be perfect, shouldn't be difficult to support the interior chimney w/ screwes or some kind of bracket. 6" triple wall Duravent pipe for next to nothing even better!

I have about 6 feet of 6" double wall chimney above the roof line and my Lopi Answer gets very little build up.

 

[turnkey4099]

My wood stove insert requires a 6" flue. My fireplace is a 10" double wall pipe. Local stove shop quoted me an insert and 6" SS flex as the whole liner. They said to install insulation at both top and bottom to seal off the gap. this is the cheapest route as the 15' of flex liner is approx 400 bucks with all the supplies, insulation etc.

Now my question is, since that above scenario sounds a bit hokey to me, and I'd like the best efficiency out of my lopi insert, and want the least amount of creosote. My thinking is that more creosote would build up in the flex liner than the solid pipe. The couple different 6" triple wall SS pipes I've measured are 8 1/2-9" OD. Would I be better off installing the 15' +or- feet inside the 10" double wall fireplace vent. It already has the proper and approved ceiling connections. How would I support the 6" triple wall inside of the 10"?

Any reccomendations from the experts?

I've been waiting for 2 months for my local shop to get around to giving a quote on the same situation. I don't see the need for more than single wall pipe + insulation for the liner in mine but you are getting your liner almost free so...

Harry K

 

[Freakingstang]

cool, i was hoping i wasn't off my rocker... lol. I want to be safe and not sorry.