My first posting in this forum. We moved into a new house in Dec 2014 and have installed the following: - Waterfurnace series 7, NVV060 - 5 ton split into 3 zones. - Intellizone 2 with 3 zones - House is 2 storey colonial about 3700SF - I have an open loop well. The well is 600' deep. pump at 140', water table at 20' incoming water temp is currently at 50 degrees and exiting around 45 - Pump is Goulds 18GS07 . 18 GPM and peaks at 26 GPM - Controller is CentriPro Model CB07412, HP3/4, V 230, 7.2 AMP, - Stoneham, MA - New construction, HERS rated at 33. all LED bulbs and high efficiency appliances. R28 Walls, great insulation and air tight - HRV geo valve is set at 90% opening making the flow at 26 GPM. if we reduce the valve opening, then the water sound is loud) Here is my issue, after running the system for a month, its awesome and we love it until i got the electrical bill. From a Waterfrunace perspective, the thermostat does energy consumption and is recording that i used 838kW in Jan. Which is averaging about 28 kW per day. No issues there, I only had electrical aux heat kickin for 30 minutes the whole month, based thermostat display. The house consumption for the month was 2700kW. So where is the whole draw coming from? I called my electrician and he brought his probe: Geo is using about 5 to 11 amps Pump using around 7 amps (consistent) I forced the geo to go into electrical aux, and it was using 50 to 65 amps (which is expected) based on my simple calculations (7 amps * 230V = 1.6kW/hour. geo runs for 20 hours/day = 32 kW per day x 30 days = 966 kW), the pump is consuming as much power as the geo during the month. The Geo used 838 kW in Jan for geo, the pump is using more. which is really crazy!!!! Considering how Cold Jan was what the geo consumed sounded reasonable and within the estimates that was provided by the geo installer the electrician measured the power at the panel incoming wires, and it registered 17.5 AMP. (inside the house). the pump and geo were running. My geo installer suggested to replace the pump with a variable speed pump and controller/drive, but did not recommend any and mentioned that he does not sell them either. My pump dealer, (GOULDS), has no idea on how to make the pump work with the variable speed control and the geo. My questions: what is the appropriate pump size/type or brand or specs for such a system? Anyone with a variable speed pump can share pump consumption data. If using a variable speed pumps, what is the typical usage of those pumps? brands? I know that the thermostat meters power consumption used by the geo, however, the pump is not metered. Can it be metered? Which pump can be metered by the pump my pump dealer suggests adding a variable speed controller to the same pump, is this right? my geo guy says that the gep demand for flow can range from 6 GPM to 18 GPM. that is why he is recommending a variable speed. I'm not sure what to do? Any help here would be greatly appreciated. !!!!