Biglurr54
ArboristSite Operative
I have been playing with my owb settings. I've noticed I have huge efficiency gains when I drop the shut off temp to 165 vs 185. When the weather is bitter cold like right now (upstate ny) I bring my temp up to get the heat in the house faster. During mild temps I I turn it down to 165 to gain the efficiency. Anyone else notice or try this? Also i messed with the temp diff. (Point that fan turns on). Again I have found d better efficiency's at 15 degree diff compared to 10 degree diff. My worry with this is could the larger temp swings put stress on the metal and joints due to expansion and contraction. I have heard the reason oil boilers are set with such small diff.s is because the varying heat contractions can fatigue the cast iron boilers. Any thoughts on this?