Hot air forced draft?

[petervb6]

Has any one ever tryed to use a Hot air draft system? insted of using a blower sucking cold air and blowing it onto the fire? Why not have a thing just like the Magic Heat Reclamer in the stack and then tunnel that Hot air down around and into the fire box? Seems like super hot air going back into the fire box would be even better then blowing cold air at the fire.

[bees1st]

I haven't tried it but I'm considering it for my piggyback,same idea,why blow cold air into hot sap,you just cool it down.

[PapaSmiff]

If you search for "Heat Exchanger" in this forum, you'll find several. There's a trader named "Len" that build an amazing one.

Preheating combustion air- page 12 diagram:
http://www.uvm.edu/~pmrc/Combustion.pdf