This is one of those questions that has items to consider. What is the boiler weight and construction … how big is the attic … would a small boiler that could do the job in another location be a consideration at similar expense.
The other part of the question is the usual …
How much would it cost to move and replace a boiler of unknown dimensions to an unspecified location on an unknown ceiling construction, passing tubing from where the boiler is now through the ceiling, patch and paint, sight unseen? Your guess would be as good as anyone else.
http://www.heatpro.us energy businessmen’s knowledge
Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.