Hello. I am in the process of building a new house. Ranch style, radiant floor heat in basement and main floor. I have done alot of research on modulating condensing boilers and plan to purchase one. I'm leaning towards the Triangle Tube Prestige with either their indirect tank or a SuperStor. The heat loss/load calculation shows 63,000 btu. So, a Prestige at 100,000 btu would be plenty, and I'm sure enough for the added load of the indirect tank. My question is whether I would be better off with a smaller boiler from a different manufacturer. Would an 80,000 btu take care of the house load and the indirect hot water tank?

Thanks,

Mark