Results for a model I have used for a long time make sense when using a forced air furnace regardless of almost infinite variations with the model. Delivered MMBtu/site MMBtu also show 98% for a 98% AFUE furnace. When using a boiler, however, the model shows the use of far more energy. I understand the boiler is using baseboards with relatively high temperatures, but still . . . . BEopt's choice .

10 98% efficient natural gas boiler (Energystar 2019 shows very few boilers over 95%; none of 98%) has a site/delivered delivered/site ratio of .907 while choice 8 #8 (95% efficient with outdoor air reset) has the same ratio at .869. Output capacity is the same and there are never any unmet hours. The two boilers are delivering 109.6 & 109.7 MMBtu while the furnace heats the house with 58.8 MMBtu delivered. delivered.

Months ago I asked at heatinghelp.com how a boiler could have results showing such a disparity in favor of forced air and was assured the software was prejudiced against hydronic. What is going on here or what don't I understand?understand? (If some text here is showing up as bold and very large, I've tried to fix it, but can't get rid of the enlargement--sorry)