strange rumble when closing draft knobs ..anyone seen the movie backdraft? heheh

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WoodButcher80

Feeling the Heat
hey guys , not to worry when reading the title . . .
ive been burning fine for 3 seasons with the baker insert i have . 15 cords later and were still in love :)

if you dont know , its an older coal/wood burning insert, and almost 600lbs ( http://www.bakerstoves.com/stoves5.htm )

anyways , i bak the stove at night to get that great 8 hours overnight burn , and do so by cramming in about 5 splits of red oak .
usually i just open the bottom ash door knobs all the way , and open the loading door knobs all the way too .. then relax for about 30 minutes till it gets up to about 700 and im good to go .
i then close the bottom ash door knobs all the way , and slowly decrease over a few minutes the top knobs to 1/2-1 turn form closed to choke it down and then its bed time!

well , a couple times when i was in a rush i cracked the ash door open(not just the knobs) to rush in some crazy air to kick the fire up real quick . i only need to do this for 15 minutes for the logs to get up to speed as compared to with the door closed.
i hate doing this though , cus im wasting heat too .
well i couple times when the stove is blazing at 600-700 and i close the ash door and shut the lower knobs i will all of a sudden notice theres really no roaring of the fire instantly and then immediately followed by this low rumble and vibration like a herd of buffalo are coming down the chimney . the first time it happened it shook the loading door window and a small poof of smoke came out of the knobs on the loading door.
i then preceed to crap my pants and hurry up and open the draft knobs at the bottom . and ALL IS WELL .... 10 seconds later i can proceed to slowly close the knobs to all the way shut.
again , this is easily avoided by not choking the fire of almost all its air supply when its roaring . i dont ever open the ash door to blaze the fire up unless its a new fire and a cold stove.
i also have a 7" stainless liner that goes from the top of the insert all the way up . my draft is fantastic, and im thinking what happens is its roaring away with great draft and then like a vacuum , all those flue gas reverse ... like the movie!! :)

anyways , just wanted to know if anyone else has had something like this happen .
pretty interesting though
 
Could be back-puffing. The quick air supply may just be charring the wood, then quickly cutting it back leaves a smoldering batch of wood. As soon as a flame reappears it ignites a big bellyful of wood gas. As you've found out, this is not a good idea. It's stressful on the pipe connections. You might go out and see if your cap is in your neighbor's yard.
 
BeGreen said:
You might go out and see if your cap is in your neighbor's yard.

haha . nah, cap is fine . i clean the pipe every year and this noise hasnt happened in over a year . all my wood is about 18% now so i dont need a cracked door to get a good flame when banking .

just wondering what the heck it was .

your theory is plausible though .
thanks.
 
Seen Backdraft . . . pretty sure it's required viewing for firefigthters . . . usually there is a copy in every firehouse I've been to . . . of course we all watch the movie and critique it.
 
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