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I have 3 apt buildings: 18, 14, and 26 units. All have hot water return lines but no recirculating pumps. I know very little about them and was wondering if i could get some basic pros/cons of having one vs leaving it as is.
All buildings get DHW via tankless coils on 1 pipe steam boiler. I rarely get complaints on lack of hot water - only during high volume times, but I'm thinking i likely need to change my tankless coils because in my memory they have not been changed, so they range at least from 10-20 years old. I do have issues controlling hot water temperatures. I pay a flat rate water bill, so at this period in time water consumption is not a variable i need to consider.
So are there many benefits to installing recirculation pumps or since its seemingly working well.. leave it? would my oil bill go up or down? Would there be a significant impact on my electrical bill? Would hot water temps remain more constant and controllable and could i reduce them to a stable number bc of it?
Thank you very much and appreciate all responses! If possible, it helps me if any answers are kept straight and simple and not super technical. I'm very handy and savvy but getting tons of math thrown at me might just leave me stuck haha.