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underfloor heating in a multi-family building
I have a an 8 floor, 8 apartment building with underfloor heating. It has central pumps, and no circulator pumps on the individual manifolds (two per apartment). The system is three years old and my super and I performed a system startup for the season. It has never been PM'd. The water was like mud and flow is low.
Question: Is water treatment recommended for these systems, and, is local pumping recommended? We are ready to perform some flow testing as we have had complaints that the residents "don't feel the heat"...we run 160F water (which seems high to me). Any experts out there that can help me?