curious to know if anyone has seen the impact to boiler from keeping a hot water boiler temperature below the sulfuric condensation temp (ie around 140).
facility uses a large hot water boiler and keeps the boiler at 130 degrees (return is 115) - and not water treatment. the boiler manufacturer recommends keeping return temps higher than 140.
my guess is there is beading/sweating in system that might be causing corrosion.
ashame because they have a mixing valve and therefore would not cost much to raise water temp of boiler
thanks for any feedback