Duraliner or Ovalized Flex

[davcenmt2]

There is lots of great information about liners on this Forum, but I wanted to create a thread specific to my situation/research.

I just recently bought a new wood stove (Blaze King Princess 29 Insert) and I'm working to get new liner before installing. My chimney is ~15ft and has 6.5x11 ID clay flue, so in order to fit insulation around liner I'll have to either get an ovalized liner or break out the clay flue. I'm not concerned about the work involved with breaking out the clay, but I'd like to avoid going that route for now.

I'm trying to decide between Mid/Heavyweight ovalized flex liner or Oval Duraliner system. Both seem like they are good options, but I have few questions/concerns about which direction to take.

Duraliner:

• I'm not completely convinced at longevity of the Duraliner system. I know many of you have had no issues, but there are others who have experienced early failure. I don't want to end up paying premium price for something that won't last.

• Duraliner makes the Flex Sections in standard and Heavyweight, Its pricer, but I'd likely opt for the Heavyweight for increased durability (unless members here thought that was not necessary). Since its my understanding that Flex pipe is Directional and Duraliner only makes Heavy weight Flex Pipe in (Oval to round) and not (round to oval), my concern is that It would require me to get the Standard Weight flex (Round to oval) adapter (6DLR-14ROF). It seems silly to pay extra for heavyweight flex only to be required to have 1 section be standard weight. Can anyone chime in on this to let me know if I have misinterpreted this, or I shouldn't worry about getting the Heavyweight and standard is fine (or one section of standard).

Ovalized Flex.

• My preference would really to be go the route of the Mid/Heavy weight flex liner, however given my that chimney is at/near the minimum recommended length, I don't want the decreased cross sectional Area of ovalizing to reduce my stoves performance. I've been having trouble finding a supplier that can ovalize a upsized liner so that the Cross Sectional area remains similar (28 sq/in). I've reached out to blaze king, on this, and they were less than helpful stating that they do no testing with ovalized liner so they can't confirm performance.

Appreciate any help in advance with assisting me in making decision on which route to take.

 

[all night moe]

I vote to break out the clay liner and install quality 6'' insulated round.
I personally don't like flex liners much.

 

[davcenmt2]

My main reason for not wanting to break out the clay flue, is in the off chance I remove the stove insert and revert it back to a standard wood burning fireplace. Probably won't happen, but that's my reasoning.

 

[bholler]

There is lots of great information about liners on this Forum, but I wanted to create a thread specific to my situation/research.

I just recently bought a new wood stove (Blaze King Princess 29 Insert) and I'm working to get new liner before installing. My chimney is ~15ft and has 6.5x11 ID clay flue, so in order to fit insulation around liner I'll have to either get an ovalized liner or break out the clay flue. I'm not concerned about the work involved with breaking out the clay, but I'd like to avoid going that route for now.

I'm trying to decide between Mid/Heavyweight ovalized flex liner or Oval Duraliner system. Both seem like they are good options, but I have few questions/concerns about which direction to take.

Duraliner:

• I'm not completely convinced at longevity of the Duraliner system. I know many of you have had no issues, but there are others who have experienced early failure. I don't want to end up paying premium price for something that won't last.

• Duraliner makes the Flex Sections in standard and Heavyweight, Its pricer, but I'd likely opt for the Heavyweight for increased durability (unless members here thought that was not necessary). Since its my understanding that Flex pipe is Directional and Duraliner only makes Heavy weight Flex Pipe in (Oval to round) and not (round to oval), my concern is that It would require me to get the Standard Weight flex (Round to oval) adapter (6DLR-14ROF). It seems silly to pay extra for heavyweight flex only to be required to have 1 section be standard weight. Can anyone chime in on this to let me know if I have misinterpreted this, or I shouldn't worry about getting the Heavyweight and standard is fine (or one section of standard).

Ovalized Flex.

• My preference would really to be go the route of the Mid/Heavy weight flex liner, however given my that chimney is at/near the minimum recommended length, I don't want the decreased cross sectional Area of ovalizing to reduce my stoves performance. I've been having trouble finding a supplier that can ovalize a upsized liner so that the Cross Sectional area remains similar (28 sq/in). I've reached out to blaze king, on this, and they were less than helpful stating that they do no testing with ovalized liner so they can't confirm performance.

Appreciate any help in advance with assisting me in making decision on which route to take.

Go with 6" equivalent oval liner which will actually be a 6.5 or 7" liner ovalized.

 

[davcenmt2]

Thanks! I'm going to keep calling around to places to see if I can source 6" equivalent Heavyweight Liner. Unless you are aware of any that will sell directly to Customers?

 

[all night moe]

Try Rockford chimney supplies?

 

[davcenmt2]

Try Rockford chimney supplies?

It was my understanding that they stopped ovalizing Heavier weight Liners.

I called ChimneyLinerKit.com and it looks like they may be able to ovalize 6.5in Heavyweight Liner (.015) for me.
Since its an oversized Liner, what is the best method to reduce it back to 6" round and secure it to my stove? Can I just Crimp 6.5in stove pipe connector?

 

[all night moe]

It was my understanding that they stopped ovalizing Heavier weight Liners.

I called ChimneyLinerKit.com and it looks like they may be able to ovalize 6.5in Heavyweight Liner (.015) for me.
Since its an oversized Liner, what is the best method to reduce it back to 6" round and secure it to my stove? Can I just Crimp 6.5in stove pipe connector?

Adapter I think. Never did a straight setup. Just a straight with 90* cleanout out a basement wall.

@bholler

 

[bholler]

It was my understanding that they stopped ovalizing Heavier weight Liners.

I called ChimneyLinerKit.com and it looks like they may be able to ovalize 6.5in Heavyweight Liner (.015) for me.
Since its an oversized Liner, what is the best method to reduce it back to 6" round and secure it to my stove? Can I just Crimp 6.5in stove pipe connector?

They typically have an adapter to do it