#11  
Old 04-27-2008, 09:58 PM
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Default Re: chimney flow rate calculator

Scary stuff Bruce! Someone who really (really) understands music is as wierd as finding someone who understands cosmology (no, not cosmetology!). I don't even want to hear about the math. I get lost every time.

Somehow, I knew you were goofin' at work! I'm calling big oil!
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  #12  
Old 04-28-2008, 07:02 AM
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Default Re: chimney flow rate calculator

Ok I will take the bait but drop it off on a smoke and mirrors expert.
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  #13  
Old 04-28-2008, 01:18 PM
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Default Re: chimney flow rate calculator

I'm using 8x8 tile with a 8x14 inch transistion also made from tile
(design stolen with pride from DMUN)

I get a 923 - when I include the height of the transision plus the length of one tile.

My oven draws well. I have not had to clean any soot off of the front facing bricks ... knock wood.

Christo
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Old 04-28-2008, 01:24 PM
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Default Re: chimney flow rate calculator

Great, we have our first baseline number. 923 draws well. Anyone have a chimney with a lower numer that draws well ?
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Old 04-29-2008, 10:37 AM
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Default Re: chimney flow rate calculator

I have an 8 inch duravent 18 inches high above my custom poured vent transiton, which approx 8 inches high. Just using those numbers I get 684 if I read the comments about using cm istead of mm correctly.

My chimney draws well.

Although this baseline number does not include the effect a good transition has for increasing the velocity of the air flow.
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Old 04-30-2008, 12:36 AM
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Default Re: chimney flow rate calculator

Thats right! Chimney hight and diameter aren't the only factors.

My outer oven archway is higher than the inner one, and I think this causes air turbulence on the way out. Which means that the smoke comes out of the front of the oven as well as the chimney and probably also that the draw isn't as good as it could be.

But it makes it easier to get into the oven for cooking, so I'm not grumbling...
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  #17  
Old 07-06-2008, 09:57 PM
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Thumbs up Re: chimney flow rate calculator

My 40" Pompeii has an 8" steel flue 3metres high and again using the diameter dimensions in cm rather than the shown mm with the height in metres, my flow rate is 1285.7. My chimney also draws well with no smoke exiting the front arch.

Neill
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Old 07-06-2008, 10:50 PM
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Default Re: chimney flow rate calculator

Quote:
Originally Posted by nissanneill View Post
, my flow rate is 1285.7.
Neill
Wow I think that's the highest flow rate we have seen. Is it fast enough to suck the toppings off your pizzas ? (might as well see if we can establish a maximum draw as well)

Bruce
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Old 07-06-2008, 11:00 PM
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Default Re: chimney flow rate calculator

Ok,
Here is the calculator again, but this time with units that match.
Attached Files
File Type: zip chimney flow rate calculator.zip (7.2 KB, 243 views)
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Old 07-07-2008, 01:18 PM
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Default Re: chimney flow rate calculator

My flow rate is 851.
I get smoke out the front.
I, like Frances, also have a higher arch in front.

But I thought most of us did....

I like my soot covered bricks.
haha

Dave
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