chimney size ?

Re: chimney size ?

PostBy: biggreen1 On: Fri Jul 11, 2008 10:45 pm

I had a chimney mason over today. Got a good price on him doing everything but the footer. Where I'm putting it it should only need to be about 5 1/2' above the lower roofline :)

He said he usually uses 8" od square liner not 8" ID. Do you-all think I should press him on a price for 8" ID?
biggreen1
 

Re: chimney size ?

PostBy: coaledsweat On: Fri Jul 11, 2008 10:57 pm

The tiles are about $20 @ piece at the brickyard for a 1.5 foot 8 X 8 square flue tile.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: chimney size ?

PostBy: vtec350 On: Fri Jul 11, 2008 11:18 pm

Biggreen1

I'm doing my chimney now too, they do not have a flue with an 8"ID,unless you use a round flue, I called every mason supply company in Ma. and Ct. They do make a flue that is an 8.5x8.5 OD and it's 7"x7" ID, they come from Canada. I purchased mine for $10.00 and are 2' pieces.

Dave
vtec350
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6


Re: chimney size ?

PostBy: biggreen1 On: Sat Jul 12, 2008 10:49 pm

If 8X8" ID flue liner is so hard to find, do most of the manufacturers mean OD when they list 8X8"? they must??????
biggreen1
 

Re: chimney size ?

PostBy: coaledsweat On: Sat Jul 12, 2008 10:52 pm

Square tiles are measured on the OD (across the flats), round tiles are measured on the ID. Why this is I have no clue.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: chimney size ?

PostBy: Yanche On: Sun Jul 13, 2008 1:11 pm

What matters in chimney draw is height and cross sectional area. In the case of nominal 8 x 8 inch (measures 8.5 x 8.5 outside), i.e. 7 x 7 inch inside, the area is 7 x 7 = 49 sq inches. In the case of 8 inch round ID, the area is pi x R^2 = 50.27 sq inches. Essentially the same area, especially when you take off some area for the rounding of the four inside corners. Chimneys of the same height constructed of either clay tile liner will work the same. Nominal 8 x 8 size fits inside standard square chimney block, inside opening 9 x 9 inches, outside slightly less than 16 inches square by one 3/8 inch nominal mortar joint. Aren't all these masonry trade dimensions wonderful!

I suspect round clay tiles are measured in ID because it's then easy to select one the mates with the same size stovepipe, e.g., 6 inch clay thimble mates with 6 inch stovepipe.
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Re: chimney size ?

PostBy: biggreen1 On: Tue Jul 15, 2008 9:27 pm

Thank you all. chimney issues are all taken care of. BG
biggreen1
 

Re: chimney size ?

PostBy: coalmeister On: Wed Jul 16, 2008 6:58 pm

biggreen1 wrote:Well, My boiler is now going out to the garage again so I have a chimney question. I've got a AA130 coming and in the instruction manual it calls for a 8"X8" flue 15' high. Where I'm thinking of building the flue it may only need to be 11' or 12' tall. Should I stick with 8"X8" or go up to a 12"X12". I've never built a chimney before so now I have another thing to learn how to do(is't life fun). My guess is that I'd be fine with a 8", but are there any advantages of going larger? Thank you. BG


I am going with black stove pipe in the garage and stainless double wall through the roof and beyond
coalmeister
 
Stove/Furnace Make: Alaska 140 Furnace -sold
Stove/Furnace Model: Harmon VF3000 -sold

Re: chimney size ?

PostBy: Yanche On: Wed Jul 16, 2008 8:59 pm

Stay with 8 x 8, and make it as tall as the recommended height as possible and still have it look good. When you build it don't do anything that doesn't allow you to make it taller if needed. Most likely somewhat shorter will be fine. Chimney draft in a AA antratube or AHS coalgun doesn't matter a lot because of the internal combustion blower. When it's not running there is only a small amount of combustion gases are produced by the idle fire. The flue gets hot enough with the forced combustion to draw well right after the combustion blower stops. This gets rid of most combustion gases. It's only when it's idling for a long time when a taller chimney would be helpful.

Have you consider a clay lined masonry chimney?
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Re: chimney size ?

PostBy: coalmeister On: Thu Jul 17, 2008 12:04 pm

biggreen1 wrote:I had a chimney mason over today. Got a good price on him doing everything but the footer. Where I'm putting it it should only need to be about 5 1/2' above the lower roofline :)

He said he usually uses 8" od square liner not 8" ID. Do you-all think I should press him on a price for 8" ID?


If I might ask, what is he charging for the chimney?

Thanks,

Mitch
coalmeister
 
Stove/Furnace Make: Alaska 140 Furnace -sold
Stove/Furnace Model: Harmon VF3000 -sold

Re: chimney size ?

PostBy: biggreen1 On: Thu Jul 17, 2008 4:38 pm

$600
biggreen1