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Making domestic hot water
New way to run boilers to make domestic hot water in indirect water heaters. (or maybe not new)
I'm being told to run boilers at 160 deg, so the boilers will run longer to make domestic hot water.
now the meat, 2) Aerco 2.0 propane boilers, and 4) 120 gallon Super stor, dual coil indirects.
I noticed that the domestic circulator ran 24/7 and never really made 140 deg water in tanks. (aquastat setting).
The Maintenance guy that has been here for several years, says i'm running the boilers too hot.
I say, crank boilers to 180/190 make hot water and turn back down. ( i suggested 180, reason coming up)
He says, run boilers at 160, and let them run (longer)...more efficient. ( i disagree)
Heating system is a combination of baseboard (old), fan coil units and some heat pumps, via a diverting valve to maintain loop temp.
Now the problem, there is no control to turn down or to a reset temp. for heating.
now the question
Is this something new, I understand condensing boilers. But it cant be more efficient to run boilers constantly and the circulator, and under a heavy load, running out of hot water.
Is this something Aerco suggests?