Has anyone come across issues with the default condensing boiler curve in eQuest? This curve is a function of part load and return water temperature, and based on how condensing boilers work you would anticipate the part load efficiency to get worse as return water temperature increased (assuming part load is the same).

I am seeing the opposite in eQuest, where the default 80F RWT is giving me a poor seasonal efficiency, and a temperature like 160 RWT (in the non-condensing spectrum) is giving me a very high seasonal efficiency.

Any insight into why this might be happening?

Adam Barker, MBSc, C.E.T., LEED AP BD+C
Energy Project Manager
Provident Energy Management Inc.
T: 416-736-0630 x 1874 | abarker at pemi.com