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[merrellroofing]

Where do you get that stuff?  I will have 12ft of insulated pipe on my BL 34-44. I'll try it and do some experiments.

[MattyNH]

Matty, I'm not trying to sell you anything, you do not need any expensive monitoring devices, a simple temp probe that sticks into the base of the stack, 20-50 dollars, an insulated tee, about 120 dollars and a slide in barometric damper for about 35 dollars, you will need to clean the stack more often but the wood savings will pay for itself in short order, keeping the heat in the boiler longer allows it to be absorbed into the water better, letting it run wild only serves to heat the outdoors.

I understand you not trying to sell me something..So what is the wood savings??

[MattyNH]

I am trying to sell you more equipment, but my customers also don't burn 12 plus cords like they used to. And you should always keep the flue and heat exchanger clean. A stove that has 900-1000 degree stack temps is half as efficient as one that keeps the temps under 550. Do it right or your just wasting wood and time. Just because it burns doesn't mean its doing what it could.
 A simple temp probe is what $20 -$30 Baro Damper $35-$40. Slip a 6" wye and removable damper on with probe. Makes for easy sweeps. Knowing your stove is doing its best is worth what value to the owner. This monitoring also helps you to know how and what specie of wood does what for your stove, how to load on mild or cold days. When to clean and so on.  I am positive the investment is FAR cheaper than the few extra cords that will be burnt.

[MattyNH]

I am trying to sell you more equipment, but my customers also don't burn 12 plus cords like they used to. And you should always keep the flue and heat exchanger clean. A stove that has 900-1000 degree stack temps is half as efficient as one that keeps the temps under 550. Do it right or your just wasting wood and time. Just because it burns doesn't mean its doing what it could.
 A simple temp probe is what $20 -$30 Baro Damper $35-$40. Slip a 6" wye and removable damper on with probe. Makes for easy sweeps. Knowing your stove is doing its best is worth what value to the owner. This monitoring also helps you to know how and what specie of wood does what for your stove, how to load on mild or cold days. When to clean and so on.  I am positive the investment is FAR cheaper than the few extra cords that will be burnt.

I think those few extra cords that will be burnt is far fetched.. Running cool temps in a high stack or any chimney is asking for trouble 

[slimjim]

Merrilroofing, Brian can ship you what you need for extra stack and you can use the tee at the back of the stove for the barometric damper.

[merrellroofing]

I have plenty of stack. Take-outs from roof jobs.

[slimjim]

Can you cut a piece of stainless to make a barometric damper? It would certainly last much better than the steel ones sold for oil boilers.

[merrellroofing]

I have a couple stainless caps for 8 inch. Would I have to buy one and replace the flap with my stainless?

[slimjim]

That would work, but I would bet that a guy with your ability could easily copy one and make the whole thing from stainless

[artbaldoni]

Can someone explain how and why the draft changes with a forced draft stove? I wouldn't think extra height would change the draft enough to make a difference.

Somebody educate me.

[slimjim]

The same way it does with an oil boiler, there is lots of thought given to the draft on different appliances, the more stack height, the more draft or vacuum put on the appliance, this will change the cubic feet per minute of air going through the boiler