less creosote with double or triple wall pipe - 27ft run

[Drewman]

Roughly 27 feet exterior (up the side of a 2 story house) piping for zero clearance unit.

Assuming creosote buildup as the smoke rises would it be wise to get triple wall pipe so it's better insulated, thought being less creosote?

We are planning on a TEE right outside the house for easy cleaning anyways. Duravent pipe.

 

[bholler]

Assuming creosote buildup as the smoke rises would it be wise to get triple wall pipe so it's better insulated

Nope triple wall has Half the insulation that the double wall has

 

[bholler]

Also i dont know of any zc units that can be installed with a tee what unit are you planning on?

 

[begreen]

Yes, that TEE is a red flag. There are no 90* elbows for class A chimney pipe.

 

[Drewman]

Thanks folks that clarifies that...

Guess I was thinking no 90 degrees bends after the TEE...haha.

Well I guess I will call my ZC dealer and see what they recommend for the FP30 and exterior chimney. I imagine a 15 or 30 degree out of the house then on up the exterior siding.

I was really hoping for a TEE and the ease of chimney sweeping!
-Andrew

 

[Grisu]

From the FP30 manual (page 16):

The chimney for the FP30 can be installed with a maximum of four 45° elbows(in Canada) and four 30° elbows(in U.S.A.) as shown in Fig. #10.

Please note that they also recommend to enclose the chimney in a chase when built outside.

 

[Drewman]

The manual also states on page 15:
"If the chimney runs up the outside of the residence, we recommend it be enclosed in a chase structure."

How firm a recommendation is that? I wish the manufacturer would say it is required to be in a chase...

 

[bholler]

How firm a recommendation is that? I wish the manufacturer would say it is required to be in a chase...

The biggest problem i see is that there is no way to seal it where the chimney would exit the house structure at an angle. You either need to run it up through the house or build a chase.

 

[Drewman]

The biggest problem i see is that there is no way to seal it where the chimney would exit the house structure at an angle. You either need to run it up through the house or build a chase.

Not much of a market for zero clearance adapters with a clean out for exterior exposure huh? haha

Thank you for the information.

 

[bholler]

Not much of a market for zero clearance adapters with a clean out for exterior exposure huh? haha

Nope you pretty much always just clean from inside anyway

 

[vanubee]

Nope triple wall has Half the insulation that the double wall has

How is this so?

 

[bholler]

How is this so?

Because insulated triple wall has 1/2" insulation then an air space to keep the outside temp down while insulated double wall has 1" of insulation to maintain the same outside temps without the need for the air space. And then there is also some triple wall with no insulation at all they just use 2 air spaces to keep outside temps down

 

[revdocjim]

Yes, that TEE is a red flag. There are no 90* elbows for class A chimney pipe.

Why is that? I've heard that before regarding the U.S. market. They are readily available in Japan.

 

[mminor]

I'm confirming what others have said.

Duravent DuraTech = double wall
Duravent DuraPlus = triple wall

The DuraTech has more insulation (i.e. Better), but many ZC fireplaces are very specific with which type of pipe has been tested and certified to be used with that specific fireplace. For example, the Heat and Glo Northstar has only two choices for chimney pipe - SL300 or Duravent DuraPlus. I would rather use the DuraTech when I buy the NorthStar FP, but I will instead use the DuraPlus (which others have said is almost as good as the DuraTech).

You can search 'DuraPlus' on this forum in the 'Titles' only and there are very good discussions on DuraTech vs DuraPlus.

I hope this helps.
Matt