Air flow

[Mazefarm]

I have a outside wood burner first time ever having one I bought it off of facebook marketplace place. The hood was missing so i built one for it . It has two big fans on the side to push the hot air. I ran metal 6 inch pipe from the hood to the ground and then under ground buried about 15 inches the first 10 feet under ground is metal then it goes to a 6 inch solid corrugated pipe for 88 feet. Then i brought it back up out of the ground into my basement window. I then hooked it into my existing ductwork for the house. I built a fire and tried it and barely any air coming into the house. I out a 6 inch inline fan right before it hooks into the existing ductwork thinking it would help pull the hot air on through but still nothing. Wat am i doing wrong?

 

[begreen]

Is this an outdoor furnace? It the duct is not very well insulated and protected from moisture then the heat loss will be significant.

Can you post some pictures of the installation?

 

[Todd]

88’ is a long run. You will lose a lot of heat and fan velocity.

 

[all night moe]

Outdoor hot air furnaces are typically operated a lot closer to the dwelling. Compared to hydronics, air is not a good "conductor" of heat.

 

[EatenByLimestone]

I imagine 88 feet of corrugated pipe has a lot of surface area to transfer heat to the soil. You’ll need a lot of insulation around it that won’t absorb water. Did you bed it in foam?

 

[begreen]

An 88' duct is going to lose a ton of heat and velocity under the best of circumstances.