I recently came from an install that had a Franklin Variable Speed pump system. The pump is located about 60 feet down and is set to 60 psi for the home. There is two heat pumps. One is a single stage water to water and the other is a two stage water to air. There is a single taco geothermal valve on the water to water and two taco geothermal valves on the water to air (2 different flow rates for the 2-speed). The amp draw while all valves are open (10.25 gpm) is 4.75 (230V pump) this seems acceptable. The amp draw with one valve open (4.5 gpm) is 4.25, this seems high. Does anyone have any experience with different brands of variable speed pumps? Does the Grundfos efficiency track better according to gpm? Is there changes that could be made to improve the pump efficiency on the Franklin system? Note: No other water was being used in the house while the test was being done. System maintained pressure with pump off (no leaks). Thanks in advance for suggestions.