I'm building a new home in central PA, it is a ranch with a full finished walkout basement. 2200 sq ft first floor, 1700 sq ft finished basement. We are doing geo, selected WaterFurnace 7 series, and are leaning open loop (if well works out right). WF GeoPro dealer did full calc for the house and came up with a little over 4 ton load, so we are doing the 5 ton WF 7 series. My question is regarding the open loop configuration we are hoping to utilize. I teetered back and forth over closed/open loops, but there is lots of water here, and I need an irrigation well for sprinklers, so I thought killing two birds with one stone would help. Cost savings of just having to do two wells versus three wells (and taking into account the deeper wells and extra cost of closed loop install) was about $11k. My only hesitation is I know you have to take into consideration the operational costs of the well pump. That's what I need help with. The supply well is drilled 180' deep, provides almost 100 GPM, and the pump would be set at 100' with static water level at 40'. Well is about 100' from the house too. My needs are this: Irrigation needs 48 psi and 12 GPM. The WF 7 I've been told needs about 15 GPM at only about 10 psi, but I've also seen that you only need 1.5-2 GPM/ton for open loop? Anyone able to help? Does the WF7 need 3 GPM/ton? Either way, I need normally 10-15 GPM only at 10 psi, and for a couple months of the summer, for a few hours a day, I need an extra 12 GPM and pressure of about 50 psi. Geo dealer only cares about his water, so this part has fallen back on well provider. That's why I need advice. He recommends a 2-tank, VFD setup as follows: Gould's pump (2 hP or 3 hP) Franklin Electric Motor - 3 phase, 230 V Pentek Intellidrive VFD 2 small bladder tanks, PIT, and FS, and leak sensor Basic operation would be pumping through 1st bladder tank to a setpoint of 10 psi for geo, thus reducing power consumption of VFD and saving operational cost. Whenever irrigation is called for, and flow past FS exceeds 1.5 GPM, the Pentek would kick up to setpoint of 50 psi. There would be a check valve then another bladder tank and the FS on the line to the irrigation system. My main questions are: 1) How much water does my WF7 need for a 5 ton? 2) Will the two pressure setup help to keep operating costs reasonable? Or is there another option that is better? 3) Will the WF7 be able to handle dual pressure feeds? 10 psi and then 50 psi periodically? I'm assuming the flow control valve will just respond accordingly during higher pressure periods right? 4) Main question: Any input on size pump to get? 2 hP looks to be borderline, especially if we'd draw down to close the 100' level, if at the same time at peak water demand, but on the other hand I'd hate to oversize and jump to the 3 hP without good reason. Advice is appreciated!! Thanks in advance.