Need Some Chimney Help

Boots · Post by **Boots** » Thu. Dec. 08, 2011 8:19 pm

I need some chimney help, I am getting ready to install my hand fired Burnham woodlander SFB-101. It has, and I quote the manual (thank you coaledsweat) "8 nominal, flue pipe" Later in the manual it says "smoke pipe must not be smaller than canopy outlet". Does this mean I can NOT connect this boiler to my existing chimney being that it is a
7-1/4" X 7-1/4" (inside measurement ) square chimney and the liner going through my basement wall is 7" round? If I connect the coal boiler to this chimney it will NOT be servicing any other appliance. I am planning to "power vent" my Oil fired boiler in order to free up my chimney for the coal boiler.

cliff notes:

chimney 7-1/4" X 7-1/4" square
liner going through wall 7" round
boiler canopy outlet 8"

Natural draft hand fired boiler

will it work.

McGiever · Post by **McGiever** » Thu. Dec. 08, 2011 8:24 pm

Yes, it will be fine, it is better to reduce at thimble than directly out of stove, and an 8" down to a 7" isn't so bad for a thimble dumping into a 7-1/4" square.

Boots · Post by **Boots** » Thu. Dec. 08, 2011 9:24 pm

McGiever wrote:Yes, it will be fine, it is better to reduce at thimble than directly out of stove, and an 8" down to a 7" isn't so bad for a thimble dumping into a 7-1/4" square.

Thank you for the fast reply. I thought that it might be ok, I have to re arrange my circ return lines in order to get the stove pipe over to the chimney but the extra plumbing work IMO is well worth the money saved on double wall SS pipe and/or the avoided labor of building a block chimney.

McGiever · Post by **McGiever** » Thu. Dec. 08, 2011 9:28 pm

Your welcome.

I hear you on that bit of plumbing being well worth the end results there.

Post by **coaledsweat** » Thu. Dec. 08, 2011 11:20 pm

How tall is that chimney and is it in or outside of the house?

Boots · Post by **Boots** » Fri. Dec. 09, 2011 10:04 am

coaledsweat wrote:How tall is that chimney and is it in or outside of the house?

The chimney is outside of the house, it is a block chimney with a brown brick facade. It is somewhere between 17' and 18' in height.

also do I need a barometric damper on the coal stove considering it is a natural draft, I cant find anything in the owners manual about it.

Post by **coaledsweat** » Fri. Dec. 09, 2011 11:10 am

The baro will limit total draft, I recommend it. If you overdraft, the extra heat you make goes up the chimney instead of heating your home. All heating appliances have some heat going up the chimney as waste to keep them going. It's a balancing act to try and keep most of the heat for yourself, set properly a baro is very good at that.

Post by **coaledsweat** » Fri. Dec. 09, 2011 11:16 am

Boots wrote:also do I need a barometric damper on the coal stove considering it is a natural draft, I cant find anything in the owners manual about it.

FIGURE 10: "Draft regulator (optional) may be installed if coal is the only fuel used."

Boots · Post by **Boots** » Fri. Dec. 09, 2011 7:44 pm

coaledsweat wrote:
Boots wrote:also do I need a barometric damper on the coal stove considering it is a natural draft, I cant find anything in the owners manual about it.

FIGURE 10: "Draft regulator (optional) may be installed if coal is the only fuel used."

I am going to install a baro damper on the coal stove. got it set aside for me at my local plumbing/heating supply store along with the "controller" for my power vent and my zone valve which they should have Monday.

after those things are purchased I can install the power vent on the oil fired boiler that will free up my chimney for the coal boiler then I can take some measurements so I can get the rest of my plumbing supplies then she will be ready to fire up!