In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
So I'm reading and trying to learn this stuff enough to pick someone to replace my boiler. I ran a couple heat loss calculations on the house. It has zero attic insulation, zero floor insulation in the crawl space, does have storm windows and 8-10 inch brick walls. I'm assuming it leaks like a sieve.
I also added up the total EDR for the house (as best as I can) and got 547 x 1.33 = 728MBH which matches the BB14-*-5 boiler in the basement. It is rated at 705-770MBH.
I then did a heat loss calculation and came up with 240MBH @ 15F, or 303MBH @ 0F. 15F being what VA is rated at.
If I go in and insulate the attic and crawl space, and reduce air infiltration by 50% those numbers drop significantly to 128MHB @ 15F and 162MBH @ 0F.
Now for the sizing question. Everything I've read here is that you size the boiler to the EDR capacity. After I install the insulation I don't need that much heating capacity. Do I still go with a big boiler, replace the radiators with smaller ones so I can go with a smaller boiler? I've not read anything on what to do when you have more EDR than you need due to improvements you made to the house.