I get my hot water direct from an oil burning furnace. I also have well water, which up until 2 years ago had no softening system. The house is almost 14 years old - I moved in 2 years ago.
I have no problems with the pressure/flow of my cold water. I have no problem with my Hot Water temperature - just the flow.
My gut is telling me that I have calcium build up and to replace the coil in the furnace - rather than installing an expensive inline water heating system.
Any other thoughts or suggestions?