This setup is in the crawlspace, the top of the boiler is about a foot below floor level. Part of my estimate was trying to figure out if the old ceiling beams would support a come-along to help lift the beast out.
While taking this picture, my back rubbed up against the crawlspace wall which is covered in efflorescence. Now I am covered in white chalk.
Shall I get into the asbestos?
I was wondering about the chain myself, however, since this is a church house let's hope Bama has the right answer.
The chain is rusty, not orange. I especially liked the sunflower collar myself, I have been around heating equipment and chimneys for 19 years and have never seen anything like that. Somebody spent a bit of time making it.
There's dovetails but that must be the peacock tail.
Don't worry about the come-along, that baby won't be coming out in one piece. Estimate as soon as a hand truck breaks the vertical plane it will be balanced.
Take casing off, most likely a bunch of cast sections bolted together with lead hammered into the seams. Remove bolts and put the hammer drill with chisel to work on the seams and then pry the heavy ba$tards apart.
The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.