Bummer Oil unit and Coal same flue

Mine actually pulls MORE draft when the oil burner kicks on. The blower on the burner unit is like a supercharger for the chimney. The manometer, which is attached to my connector pipe for the coal stove right before it enters the chimney, reads .06" with the burner running & a full firebox of coal. With just the coal going, it's .04" - 05" on a calm cold day. When it gets into the 50's out, it's .03". Never have had a puffback (reverse draft).

Rob, what and where did you get the reflectic barrier behind your Hitzer stove, and did you notice alot more heat being put into the basement by using it ? I was thinking I read on here somewhere to put the coal appliance above the boiler, but maybe it doesnt make a difference ?

I just used a foil-faced bubble wrap, commonly known as "radiant barrier". There was a wooden partition behind the stove, and a unheated root cellar to the left. Even though there was like 6' of clearance around the stove, the walls got HOT when I was really cooking the Hitzer. If I went in the root cellar the concrete wall between me and the stove felt warm to the touch. After I put up the radiant barrier the walls felt cool to the touch, and if you stood in front of the stove...the heat would make your eyes water. I don't know if it saved me any coal, but it did cool down the things I didn't want heated.

As for one above the other, I think it would make sense to put the appliance the requires the most draft on top. In my case, the oil boiler called for -0.05" of WC, and that also worked very well for the Hitzer.

[quote="Rob R."]I just used a foil-faced bubble wrap, commonly known as "radiant barrier". There was a wooden partition behind the stove, and a unheated root cellar to the left. Even though there was like 6' of clearance around the stove, the walls got HOT when I was really cooking the Hitzer. If I went in the root cellar the concrete wall between me and the stove felt warm to the touch. After I put up the radiant barrier the walls felt cool to the touch, and if you stood in front of the stove...the heat would make your eyes water. I don't know if it saved me any coal, but it did cool down the things I didn't want heated.

Thanks, sounds just like what I need.

as rob said the appliance with the heighest draft requirement highest on the flue. typically that will be the solid fuel appliance; it is unusual to have an oil appliance with a draft requirement of much over -.02 and generally the lower the better (even to the point of firing positive in the chamber) with any newer flame-retention burners.