LudlowLou wrote:Hey everyone! I restarted on Saturday after some minor adjustments that are producing huge results; Thanks to Ligthening and his post regarding fly ash and air by pass. Although our furnaces are from different vendors, they are in fact the same. I found the passages front and rear that allow air to by pass grates and producing over fire. Over fire is a bad thing for coal and appears to be the main culprit. Once I blocked off these passages, wow.....it is like a different stove!
I'm happy my post helped you about blocking those passages so air couldn't bypass the coal bed. It made a HUGE difference in heat output for me. That bypassing air was just robbing my furnace of heat right out the chimney. Yeah these furnaces we are using are kinda set up for "solid fuel" be it wood or bituminous or anthracite or garbage lol.. BUT now that its tweaked for anthracite, thats all I plan to use. I even bolted a plate over the "over fire draft" on the load door so no air could weasle thru there. But I have to prop the load door open a crack so volitiles can burn off after re fueling so I don't get a nasty puff back.
DO you have a baro damper installed? If so Great!! If not, you might want to consider it. Those by passing air passages acted kinda like a self regulator, letting air by so the coal bed wasn't so likely to over heat. What happened to me was that after I blocked those passages, my furnace heated like crazy but I couldn't control it. it would either spiral upward into an overheat or spiral downward into coldness. Very rarely would everything balance just right and it would be steady. Then I installed the Baro and it became a tamed heat monster (pardon my enthusiasm lol). Now I get a steady 110 degrees thru my ducts for 9 -12 hours at a time