Geo-Flo manufactures both pressurized and non-pressurized flow centers utilizing permanent magnet ECM pumps which allow the highest geothermal system efficiency possible. Our full offering allows you to choose from stand alone single- and double-pump systems that have built-in controls such as the Flo-Link VS panel mount system, the Taco 0034e variable speed flow center, and the larger Magna3 VS flow centers, or Flo-Link flow centers that feature the Grundfos UPMXL pump that are controlled directly from the geothermal heat pump’s control board. The UPMXL pump is driven by a PWM signal that is considered standard (100% PWM = pump off, 0% PWM= pump full speed) or inverted (0% PWM = pump off, 100% PWM= pump full speed). WaterFurnace manufactured heat pumps use the standard PWM profile while ClimateMaster units use the inverted PWM signal. Our Flo-Link panel mount flow centers utilize the standard PWM signal. Follow the links below along with their corresponding installation manuals (IOMs) and submittal sheets for additional information.