Hey guys! I've posted here a little bit about my home. I've lived in it for about a year now and have some observations and concerns. Currently, I have a 3-ton and 2-ton WaterFurnace series 5 units in my home that the previous owner installed. Both units share the original horizontal closed loops that I know very little about (length and depth). I live in a pretty dense clay soil environment. The original guy who specified the loops and oversaw it said he did remember they went a "full bucket depth" meaning its 5 feet deep despite not needing that depth by code (again I don't know much about this if it's valid but the house is about 15 years old and peoples memory is foggy. My bill/consumption is higher here in South Charlotte NC than my home in SWFL (tropics) with 5 AC air cooled units. The house there was block vs this house which is ICF. Last Fall I installed open cell foam on the underside of the roof to seal the attic space and make it conditioned. The AC unit in the attic is no longer soaking wet all summer long and my bill was down year over year for the months of May and June, but July and August haven't been good. My loop temps are 99 entering and 109 leaving. I suspect I have a loop capacity issue - either too short or too shallow - not sure. Im running my AC units various times depending on outdoor temps but on the hottest days I'm running them for 21 hours and on average days 14 hours or so? The unit upstairs I believe is multi-stages. We set the thermostats to 72 upstairs and 71 main level. We don't believe the house is cool enough and humidity can be in the mid to high 50's on humid days and if I am lucky sits in the high 40's. I spoke briefly to the installing contractor and he was suggesting drilling vertical wells to replace the horizontal loops and add capacity. I don't think that's inexpensive and would require boring to get to the units in the garage. I considered replacing the upstairs unit with an air-cooled unit and then I might have less strain on my loops. I've been told, perhaps here, that to make sure there are no bubbles in the loop and the AC company assures me there are not - I'm not 100% sure. Anyway thanks for reading this much and any insight is greatly appreciated.