All in one pump and control - Easy to install: Attach 2 included sensors and dial in the desired Delta-T - Snap in replaceable PC board - LED status panel - Fuse protected - Plug in low voltage wiring terminal - Increases system efficiency - Pump always runs at minimum required speed to eliminate velocity noise Eliminates need for a pressure by-pass valve - Conserves energy - Achieves system design goals, even when Installed system varies from original design Pump automatically adjusts to current system conditions - Spend less time figuring out pressure drop (for proper pump sizing) when servicing existing systems. Pump exercise - Delivers Ideal BTU/hr heat transfer for all styles of emitters