I have the exact same unit as MPatrick (which is how I found this thread)...hoping someone can help me out even though this thread is a year old now.
We live in NW Florida about a mile from the gulf. The internal square footage is considered to be around 2150 (+- 50 s.f.) but our ceilings range from 9 to 12 feet high (probably averages about 10.25'). It is a single story home and while we had a very reputable builder, at the end they do an energy efficiency rating on the home...out of 0 to 100, it was 96 or so, with 100 being worst.
We got the same unit as MPatrick as we wanted to cool the garage for additional usable space, though we took no other measures to make that space energy efficient. One drawback, though, is that we usually do keep the garage door closed (leading to the house) and when doing so, the return air draw is enough to pull one door in line-of-sight closed on occasion.
We have very low energy costs per kWh, which is part of the reason I believe most builders here are so poor on energy efficiency. Our cost is about 7.6 cents per kWh.
We are also VERY liberal with our house cooling and with our pool heating (both due to health necessity). The house temp is typically 71 - 73...occasionally, 74 or 75. The pool is usually kept around 93 degrees. The pool is covered with a scroll compressor heat pump of high efficiency (sorry, but I do not have the rating handy), so while it is still somewhat pricey to heat, I estimate it contributes an average of $110/mo during the 7.5 months/year we operate it.
For one year, we were in a program where we could buy our energy at different prices (based on consumption and time of day)...however, it required having a land line....so when the phone line went, so did that program.
We have gas and electric (the gas is also of poor efficiency....80.5), but the electric accounts for roughly $3000 annually. However, it seems to be worsening year-over-year. We just had a record $410 electric bill at the rate I described (7.6 cents/kWh) in addition to a $45 gas bill. We have had our Rheem (11 seer) since building the house in 1999 and I have never been impressed with it other than its ability to cool the entire house even when temps are in the upper-90s day after day. That is where our temps peak out...we do not break 100.
I am strongly considering any and all measures to increase the efficiency of our house/appliances. The washer, pool scroll compressor heat pump, and refrigerator are the only high efficiency devices in the house. From what I can tell, the A/C and possibly the dryer (though that is occasional in usage) appear to be the largest consumers in studying the meter. While just about everything was running last night, we consumed an entire kWh in 3 minutes 6 seconds! We do have a number of computers which are always on (not the monitors, though), but during periods where the energy guzzlers are not running, the wheel will make a 1/12 kWh rotation in about 13 seconds. That seems to be our low rate that I have witnessed. Still, that would come out to far more than the 140 - 160 kWh/day we are averaging...I'm not sure what changes when we go to bed to slow the rate down farther.
Unfortunately, you can see I know next to nothing in this area save trial and error...I know nothing of the internals other than that the same model Rheem indicates it also has a scroll compressor. That's basically where my [lack of] knowledge ends.