Tomorrow I am replacing the cast iron boiler located in the basement of my project house. It probably weighs 500 lbs. I’m going to pull it out in one piece and lower the new boiler down the stairs with my lifting equipment. I have a 2000 lb chain hoist, a 2000 lb shop crane, a 1000 lb motorcycle lift and several block and tackle to get the job done. Fortunately for me there is an outside entrance to the bsmt.