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Looking for someone to skype about my Mass Rocket Heater for my greenhouse in Japan

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My skype is "foundup" I am not getting suction and i probably because the gap is greater than 1.5 inches... also is the center burn chamber too small?

her the link to a pic (dont have one on this pc) http://www.facebook.com/photo.php?fbid=10151466642587184&set=a.472098482183.287910.694832183&type=1&theater

thanks for the help,

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you need to insulate the burn tunnel and riser, hint - insulative materials are usually very light in weight.....do a search for papercrete/paperclay ceramics or insulative refractory....
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Location: Hungary
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From the picture i notice that you have a short exhaust? Notice that in a rocket mass heater a lot of the heat is taken out through a long exhaust tube, the barel is not all the heat transfer surface. For trying it, it is ok.
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