Based on the system design, the heat-distribution units shall be selected in accordance with the manufacturer's specifications.
Heat-distribution units shall be installed
in accordance with the manufacturer's installation instructions
and this code.
Hydronic heat-distribution units or other system components shall be designed, installed, and protected from freezing.
System loops shall be installed so that the design flow rates are achieved within the system.
The flash point of a transfer
fluid in a hydronic piping system shall be a minimum of 50°F
(28°C) above the maximum system operating temperature.
The transfer fluid shall be compatible with the makeup water
supplied to the system.