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Too much draft with RMH possible .. ?  RSS feed

 
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My Rocket has a strong draft .. as a Rocket should, but when there is a lot of wind I have the impression that the draft is so strong that the heat would not have enough time if it where  to heat the mass .. ?
Any ideas on this .. ?
 
gardener
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Location: latitude 47 N.W. montana zone 6A
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Too much draft ! I haven't heard of anybody complain about that before...  wind and back draft yes . If that is the only issue its a good one to have ! What is your system ? How big ?  If it is truly super windy at your location then a spinner cap on your outlet could help . By the time your heat leaves the stack the majority of the heat should be absorbed. Closing your feed tube after the fire is out will also help retain your heat.
 
petra sips
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I close the feed tube of for about halve it's size cause I really have the impression the Rocket gets less warm.
And yes I have a spinner cap on this one , the second one I build,
The first one I build, how has a lower roof btw,all the back drafts where over after putting a spinner cap.

And yes close the feed tube after burning ..

It is a 5 inch system with a L-shaped bench.
 
thomas rubino
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Petra; Do you have a way to check the temperature of your chimney ? such as a digital temp gun ?  Outgoing air on my 8" system is pretty steady around 130 F . Monitoring the outgoing air temp on a calm day verses a windy day would tell you if you are losing extra heat.  Not recommended to try putting a standard wood stove dampener in the outgoing pipe, to much chance of carbon monoxide backing up into the house.  By the way I remember your post with the pictures of your build !  Very very nice work !
 
gardener
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Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
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Hi everybody.

Well, i gonna talk theoretical here.

If the draft is too strong, the fire will be too cold. And, temperature exchange time will be lessened in the mass.

So theoretically, draft can be too strong. But, to know where that point is, you would have to be an expert. Which i'm not. 
 
petra sips
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No Thomas I did measure the temperature .. I'd never heard about the dig temp gun and so just googled it. I might buy one. Although my house is not well isolated and one feels draft in the house, I also def can feel that the Rocket is less hot. I try to experiment a little with the closing of of the feed tube..
 
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