For use in a closed loop design. Flow up to 3500 L/h (15.4 USgpm).
In conjunction with boilers having high resistance (condensing) or when total flow rate of all parallel running circulators is higher than maximum flow rate of the boiler, the low-loss header provides hydraulic separation, decoupling boiler and system circuits from each other.
MW HS-Product Specification
MW HS - Installation & User Manual
It is recommended to use the low-loss header in applications in which the total system flow rate exceeds the maximum boiler flow rate.
PAW strongly recommends the use of a low-loss header in cases where the system head and flow rates are unknown.