Outdoor Wood Furnace Info
Outdoor Furnaces - Manufacturers WITH EPA-Certified Models => Portage & Main => Topic started by: Super44 on November 02, 2017, 10:51:03 AM
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On our 3rd season now and I may have figured out an easy way to keep the fire bricks where they belong. They tend to move when stirring the ashes and last season ended with them close together in the center and a large openings at the ends. This made getting the ashes to drop out the bottom something of a challenge. For this season I used 1/2 inch X 2.5 inch or longer bolts with large washers placed in the gaps after I cleaned the boiler. The longer bolts will help them stay put. So far this season ( still pretty early ) it seem to be getting a better burn and the ashes are not pilling up like the first 2 seasons. It is a fairly simple and cheap fix.
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Good advice
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I had that issue also, and I did something similar. After the bricks started to crack I replaced with the new style with built in spacers and that fixed the problem. But I find that it smokes more when loading than with the older bricks. I had the small bricks and there were more gaps for air to come up through. I think I get better burn times with the new style though.
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It seems that keeping the correct spacing between the fire bricks has gained me 2 degrees on the incoming line and a LOT less ash issues.
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Here is what I made ,I first tried 10 mm re bar found it was to thin used 19 mm spacing worked out just right . Also have no spacing at the back of the heater ,last brick. What I found was I was getting ash in the air injection hole .now with no spacing at the very back I get little to no ash in there . This is my 3 rd season with no isues . The frame shows no signs of bending ,very easy to pull out for cleaning
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I made something like Revx but it warped and twisted due to the heat. For this year I put 3/8 carriage bolts between the bricks. So far so good.