I wanna see this forced air natural gas burner please. Take lots of photos. I know your in a home and have residential gas pressure. I'm in the same boat. My NG service is literally 10 feet from my furnace and would like to make the switch.
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"Sometimes by losing a battle you find a new way to win the war"
-- Donald Trump --
Iíll do that though it may be a while yet. Two years ago when I built onto my shop I had a 2Ē NG line run from the primary service line. I asked to have an auxiliary tap installed outside where the service entered the shop thinking down the road to supplying the foundry furnace. I was traveling for a week when the work was done and by the time I returned home,the mason had been by to do his duty and hereís what I got.
No auxiliary tap and probably have to break out some mortar and stone (and put it back!) to get one in there but still no sure how to get it apart other than a Sawzall.
On the blower, I did start a thread over in the burner section on the central vacuum blower/motor. Iíve tested that now and it kicks butt and is easily controlled. Not yet to the point of lighting it though.
I figure itís good for at least 500kbtu/hr
The engine lurking in the background in post #88's photos, what is that for? I seriously doubt that it's scheduled to go in the foundry. But then that furnace pretty much either has, or is going to get, everything but the kitchen sink already so I guess you could be building the forum's very first V-8 powered furnace. You've created some amazing shapes with the refractory.
Too many irons, not enough fire,
Not for my furnace, but when I was a kid, I reckoned anything that didn't have an engine needed one.