I beleive that my Geocomfort 410A system uses to much electricity for heating.
If the outside temperartur is below freezing the systems uses approx. 30-40KWh/day.
It is a ground loop system.
Thanks
Klaus

I'm a homeowner. Do you know if your electric auxiliary heat is unnecessarily coming on by possibly recovering in the morning from a nigh time temperature setback? If so, you can read some recent threads by doing a search for "aux heat lockout" without the quotes.

Klaus, We have the same Compressor brand (GeoComfort). I am also a homeowner so I can only relate with what I have on my bill from one year we have our system. We have 3 ton-2 story, 1800 SF, close loop-vertical, 2 zone and 2 thermostat, 1 stage. We live in New Jersey. As of November of this year, our electric usage average about 14KW a day with the same average temp of 52 degrees. Last December 2008, our usage averaged about 48KW a day with average temp of 40 degrees.

Thank you for the information. My system is 5 ton and the house has 2500 sqft.

Thank you very very much, excellent data 

It is early enough in the heating season that systems with aux strips shouldn't be using them yet.

If yours is now, get help

My aux. heat is disconnected, thank you !

If this is a new install compaction may be an issue.
joe

From what I see of the graph this appears to be a 43 day peroid.
If you have data for the whole heating season I would be very interested in seeing the graph or perferrably the raw data and the installation location so I could do an analysis.

retiredeng: I tried to send a reply with my raw data in excel format as an attachment, but this system does not allow that. I could not PM you the info either. Not sure how to get you the raw data, but I am interested to hear about your analysis.

OP Klaus gives his location as Janesville, CA. It isn't too far from and at about the same elevation as Reno, NV, which has a design day temp of 11. That suggests that with temps in 30s load might be half of design. That might translate into 6 hours of daily operation. A 5 ton system producing 50k Btuh at a COP of 3.0 operating for 6 hours would use 29.3 kwh. Throw in some cycling losses and some errors in the above assumptions and 30-40 kwh per day isn't out of the question.

Thank you, your assumptions are pretty close, but I'm using up to 20-30% more. The elevation of my house is also a little higher (~300 ft) than Reno.

Klaus

Is it?
j

No, it was installed last year in July.

We might be at the limits of internet support without some hard data - run times and airside / waterside flows and delta-Ts, unit amps, etc.

08?

Yes, 08.

What was last years consumption. Is system independantly metered?
Joe

The system is not independantly metered. The power consumption during Nov/Dec 08 was approx. 60-70 KWh daily.
Klaus