Hello all, First time to post here. Great forum. My apologies for long post but wanted to include pertinent and useful info. Hopefully someone can shed some light on our situation. We just finished our new home in central Arkansas and moved in about 6 weeks ago. Just in time for the hottest June on record here. Dry and hot. About 8 degrees hotter on average than previous years. I expected my electrical usage to be high but not what we are experiencing right now. Since moving in we are averaging 3.25 kW per hour. Actually, that really doesn't vary hour to hour. 3.25 kw/hr at 2pm and 3.25 kw/hr at 2am. That is one thing that has me puzzled. The other is that we built a fairly tight, well insulated house and are still using that much energy. Had a blower test done that revealed a 170 cfm loss in the air ducts which appears to be good. (Energy star requires less than 204 cfm for this size house.) Also revealed a ENIR of 0.17 which is less than the Energy Star requirement of 0.35. So it is pretty dang tight. 3400 sqft including 600 sqft bonus room upstairs. We have PU SIP exterior walls providing an R26 and very little thermal bridging. Used the cam-lock SIPS so no 2X4 splines. Open cell spray foam layer over all ducts (in attic) to minimize air loss. 2 - 3 inches of open cell foam on attic floor to "air seal" the house with another 12" of loose blown cellulose to get the R value up. The bonus room has a full 3.5" of open cell foam on walls. Windows are double pane Integrity by Marvin. Also all energy star appliances. So I don't think we are using a lot of energy other than the heat pump to cool the house: 4 ton WaterFurnace Envision (in a cooled utility room) Five 125' extended slinky loops. Depth is 4 feet. About 6 to 10 feet apart. I know lots of people go 5' here but installer showed me the numbers and 4 feet looked good. He doesn't like those 5' trenches so much anymore. He is reputable installer. Early adopter of geo years ago. 4 zones: living area, master area, kids bedrooms, upstairs. Installer did a manual J which said use a 4 ton unit. All other quotes suggested larger units, "sizing up a bit". For some reason other installers also wanted to use only one or two returns for the whole house. This installer went with 4 returns. I wasn't anticipating using this much energy to cool the house. The installer is coming back out on Saturday to look everything over. Am I off on this? 3.25kW/hr for this type of geo unit and house? Please any help at all is appreciated. My reputation is at stake here! Wife keeps asking why we spent all the extra money on the geo and insulation just to get a huge bill.