Just found this place. I have been researching and experimenting(mainly with babbington) for a few years now. I made a forced air heater for my garage with a 6' long finned heat exchanger. The burner is on the inside of the garage and shoots down the center of the finned 6' tube. A blower on the outside of the garage pushes outside air along the outside of the heatexchanger pipe. It outputs about 300F air into the garage and gets the temp from 30F to comfortable in about 1/2 hour or so. I also pull in outside air with a computer fan to supply secondary air for the burn down the inside of the heat exchanger.
I built the babbington using a standard fuel oil nozzle with the filter and diffuser removed. I don't use a fuel pump. I put the fuel in a 3 gallon air pressure/compressor tank. I have 2 regulators attached to the top of the tank. One feeds the 25PSI to the nozzle. the other is a LP regulator and it pressurizes the airspace on top of the fuel. I use a ball valve on the bottom of the tank to turn fuel on and off, and regulate air pressure in the tank to control fuel flow(less than 1 PSI) to tune the burn... I only deliver the ammount of fuel to the nozzle that it sprays and carefully position the stream so that there is no fuel bypassing the air jet(if there is, something is wrong:)) I have a small container to catch any that does. Been running this setup for 2 years now and it heats the garage great.
Once I have a handle on attachments, I will post some pics.
Here is a link to a youtube vid of when I was developing the burner. Still gravity fed, before I came up with the pressure tank feed.
https://youtube.com/watch?v=3ACukFExR4I
