Liner installtion for coal stove

Hi,

Im trying to get my coal stove installed and need some information on the liner.

My chimney is rectangle that runs through the center of the house. For the liner, does it need to be an oval liner since the chimney is rectangle to accommodate the installation around the liner?

Does the liner even need to be insulated since the chimney is through the center of the house?

Thx.

Depends where you are located...
No liner needed if Clay liner is sound...
Or the chimney is sound but without any liner for that matter...

CapeCoaler wrote: ↑

Thu. Aug. 22, 2019 2:42 pm

Depends where you are located...
No liner needed if Clay liner is sound...
Or the chimney is sound but without any liner for that matter...

Im in NY and a liner is required. also, this is for an insert stove.

By building code?...
Just have to get past smoke shelf...
I have 7 foot on my 503 Hitzer insert...

hi,

yeah code. Im installing a 503 Hitzer. If I go without an insulated liner I go with a round liner and less expensive than an oval liner.

The only place you need oval is going through a fireplace damper.

coaledsweat wrote: ↑

Thu. Aug. 22, 2019 4:45 pm

The only place you need oval is going through a fireplace damper.

The installer told me the entire liner would have to be oval due to the chimney being rectangle. He said an insulated liner would not fit if it was round. Does that make sense? I guess I need to measure the dimensions of chimney.

It would make sense if it is a very small chimney flue.

Liners are for wood inserts...Never for any coal insert...codes and/or liner salesman are crazy in NY.

I would ask to see the section of code concerning your installation. Often inspectors are mistaken. This just seems crazy to me.

Every chimney sweep I’ve spoken with here in Ohio wants to sell you a liner...that’s how they make more money. Actually, the idea is to have the outlet of the stove remain constant to the top of the chimney for best draw on the chimney. I get that, but the reality is that it’s not practical.

1. It leaves you no option, but to change the liner again if for any reason you may have to, or want to, change stoves in the middle of the season and the new stove having a different size outlet...then your stuck spending more money.

2. A clay liner still meets current new construction building code nearly in every state that I’m aware of. Replacing clay liners can be done from the top down with a little thought and research. Youtube is your friend...

3. Expandable corrugated liners have more surface area...for wood burning this means more creosote via more drag or friction on the draft. I hate this idea and no sweep will ever convince me after seeing YouTube videos of brand new liners just one month in on burning with wood and full of junk. With coal the worry is them rotting out too soon.

4. Better draft from say an 8x8 clay liner to a 6” expendable liner? Maybe...but let’s compare apples to apples...6” smooth round clay to 6” expandable stainless steel. There’s more surface area in the SS liner and therefore more friction and less draft. Go SS smooth wall and now we’re going somewhere.

5. Clay should and will last forever in a coal stove if you keep the water out of it with a cap.

6. Did I mention I’m still partial to clay liners?

7. Did I mention you can have the clay liner coated with refractory cement to withstand even higher temperatures than a standard clay liner? Up to 2500 degrees if my memory serves me. Look up chimney saver products...Richmond Indiana.

Your installer is full of *censored*. No where in NYS is a liner required by code unless your clay is trashed.

freetown fred wrote: ↑

Fri. Aug. 23, 2019 5:20 am

Your installer is full of *censored*. No where in NYS is a liner required by code unless your clay is trashed.

Same thing here in Ohio, Fred. Even if the clay is trashed there's no law that says you can't replace it with clay...it's just a little more work...in some cases a lot more work.

IF your chimney sweep is less than 50 years old they very likely have zero knowledge of coal burning...at least in my area. An easy test is to start asking them about different types of coal. You will know very shortly what their knowledge base is. That's what makes this place so good...like minded people sharing decades of coal burning knowledge.