ss looking for feedback and or ss on building cheap boilers. I am ss running a 55 gal ss stove with 5 ss tubes running through it. it heats 3000 sf in MA via radiant staple up. I'm thinking of building one out of an oil tank and 50' of tube. It would be partitioned of into fire box ash bin and exhaust chamber. It would be fan forced like my current setup. My current setup cost less than $500.00 to build with no welding. Big brother would not be much more money, I just need to learn how to weld.