Howdy,
I just finished building a Waste Oil Heater for our shop from plans we downloaded from Mother Earth News.
so far I'm pretty impressed.
nothing but recycled parts: old hot water tank for the housing
a stainless steel pan and cast iron skillet and some stainless steel
4" piping
lots of heat
I found out that in order to not get the oily smell the burner has to be very hot before turning on the oil drip.
Any of you built anything like it
keeping warm in the frozen north
hank