<html><head></head><body class="hmmessage" style="background-color: rgb(255, 255, 255); line-height: initial;"> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Dear Marc</div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Sounds like you have a good combustion process. </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Yes opening a rear hole will increase total air so you cut down on the entrance or as previously explained, limit the outflow using the pot rest height. </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">The rear entry of air helps lower the CO produced at the back and to a certain extent keeps the flame off the back wall. </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">A combustion analyser won't help with PM measurement unfortunately. For they you need additional things. if you can afford one thing, get or make an oxygen sensor. You can do a lot with just the O2 level alone. </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">All cars have one mounted in the exhaust manifold. There are instructions on line explaining how to use it. </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Any gas instrument you have will need O2 as well. It is the key to detecting excess air. </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Keep struggling, keep winning.</div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Crispin </div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><br><div id="_originalContent" style="">
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<div dir="ltr">Dear A.D.Karve and Crispin,<div><br></div><div>I agree with Karve, I think the primary air not consumed in the primary burning is used in the flame zone to burn the gases.</div><div><span style="font-size: 12pt;">I think this is some kind of "balanced point" I've found that maybe only works on high power mode: as I am powering an oven, </span><span style="font-size: 12pt;">I use this stove on high power mode almost always. I haven't tried enough in low power mode.</span></div><div><br></div><div>Crispin, yes, I do have a grate under the tips of the sticks, and I do normally burn the charcoal. Only ashes are left.</div><div><span style="font-family: Calibri, 'Slate Pro', sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">When you say "make an opening at the back of the stove to admit the air" I wonder: still more primary air? Why this hole?</span></div><div><br></div><div>Yes, the excess air maybe dilutes the smoke and this may be the reason I don't see it. Maybe some day I'll get a combustion analyser, but prices are still too high for me.</div><div><br></div><div><span style="color: rgb(31, 73, 125); font-family: Calibri, 'Slate Pro', sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">Thanks</span></div><div><span style="color: rgb(31, 73, 125); font-family: Calibri, 'Slate Pro', sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);"><br></span></div><div><span style="font-size: 12pt;">> Date: Sat, 6 Jun 2015 09:25:39 +0530</span></div><div><div>> From: adkarve@gmail.com<br>> To: stoves@lists.bioenergylists.org<br>> Subject: Re: [Stoves] Lots of primary air<br>> <br>> Dear Marc,<br>> <br>> It seems that all the oxygen in the primary air is not consumed at the<br>> point where the wood is burning and that the leftover oxygen is<br>> utilized for burning the volatiles in the flame.<br>> <br>> Yours A.D.Karve<br>> ***<br>> Dr. A.D. Karve<br>> <br>> Chairman, Samuchit Enviro Tech Pvt Ltd (www.samuchit.com)<br>> <br>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br>> <br>> <br></div></div></div><!--end of _originalContent --></div></body></html>