HBX SolarBloc
Designed specifically for internal heat exchanger, closed loop solar thermal systems the SolarBloc automatically controls the temperature differential using a variable speed pump and flow sensing.  Built in features will control a boiler backup or heat dump.  Direct connect fittings simplify and reduce installation time.

SolarBloc Features
Fully integrated control
Integrated flow sensing
Built-in air eliminator
Controls either automatic boiler backup or heat dump
Variable speed pump control
Single dial operation
Automatic BTU calculation
Multi-color back-lit display
Easy installation and commissioning