Outdoor Wood Furnace Info

All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: coaldozer on January 26, 2014, 08:25:42 AM

Title: draft size
Post by: coaldozer on January 26, 2014, 08:25:42 AM

I am working on build, and am at the point of installing the forced air draft pipe under the grate . My question is, what size pipe should I use 3" or 4". What cfm blower- and does it have to be multi speed? Get this done and I will be back to pick your brain some more. Thanks for all the help everyone has given so far. ^-^

Title: Re: draft size
Post by: hondaracer2oo4 on January 26, 2014, 08:42:55 AM

Mine is  3x3 square. I don't really thing that it matters much though. You are just providing a path for the blower to move the air through. I would say don't go smaller than the output area of the fan or you will be restricting the cfm rating of the fan.