Hi,
The story is that I have two boilers. One is water and the second one is steam. I am trying to optimize my bills and I think I should remove the steam boiler and use the water boiler to heat my house (NYC, private home with basement, 1FL and 2FL)
I currently have a water heater installed and there are radiators in the basement and a radiant floor for floor #1. I would like to add a few radiators to the 1st floor (the heated floor doesn't do well) and add 6 radiators to the 2nd floor.
I currently have a Utica UH15B096FE boiler:
I'm not good at calculations but based on the architectural survey each floor has the same measurements, if I understood correctly: 45.7x19.6 which makes it ~940 sq ft per floor.
3 Floors (Basement, 1FL, 2FL) in sum become 2820 sq ft.
- Do I need to change the existing Utica boiler to another one or is this one can support the whole house?
- How can I calculate it or find it out?
Thank you in advance.

