Creosote issues with newmac cl86

[crowellsr]

I have a newmac cl86 wood/oil combination and it seems to be a creosote factory. I'm burning two year old maple and beech and the fire gets so hot that you can barely stand to have the firebox door open for more than a split second. I also have no issues keeping the house warm during the winter. It gets quite a bit of creosote build up (more than I think it should get). I checked the flue draft and it is -0.04 to -0.06 where the manual says minimum -0.03 maximum -0.05. It currently has a single wall 8 inch flue with two 45 degree bends and a barometric damper in between.

Any help would be greatly appreciated.

 

[David_QC]

Is there any difference in creosote before and after the barometric damper ? Does the barometric damper door is full of creosote ?

 

[crowellsr]

I didn't notice when I took it off to clean it whether one end was worse than the other. The barometric damper door does get a little bit of creosote on the back of it but nothing like the inside of the flue pipe.

 

[maple1]

Where exactly is the creosote building? Double wall might help.

 

[Fred61]

You say you're burning 2 year old wood. Has it been split for 2 years or was it in blocks and recently split?

 

[crowellsr]

The creosote only seems to build up in the flue pipe, I don't seem to get much in the outside insulated chimney. The wood has been split for two years and I periodically check with a moisture meter

 

[rippinryno]

how much creosote are you talking about? like 1 inch off the walls?

 

[crowellsr]

I cleaned it before Christmas and cleaned it yesterday and there was probably about an 1/8 of an inch

 

[maple1]

That doesn't sound like a big amount. Double walled pipe should make less.

 

[crowellsr]

It's only been a little over a month since the last cleaning. I'm pretty new to wood burning so I'm trying to avoid any problems I can

 

[Fred61]

Would you say that it is building up in the area or adjacent to where the pipe attaches to the masonry thimble. Masonry is a big heat sink and could be cooling the pipe where it slips in to the thimble.

 

[crowellsr]

What is the masonry thimble?

 

[Fred61]

I assumed this was going into a masonry chimney. No?

 

[crowellsr]

No it goes in to an insulated chimney and goes through the wall

 

[Fred61]

I guess I missed that! Sorry!