......... Starting a "New Topic"

I'm here today.  How can I be helpful?

Best regards,

Bill

If you're looking for an historical perspective of electricity grid rates in the Dallas area for the past 5 years, it's one of the 4 historical charts at
http://www.welserver.com/WEL0043 .  For 2011, grid rate averaged 9.9¢/kwh.  This year so far, for past 12 months, the grid rate is down, averaging 9.0 ¢.

If you're looking for an historical perspective of what it costs to cool & heat a 3400 sf single story structure using geo, there's a Monthly Cost chart at the same above reference.  Right now, the rolling 12 month average for heating and cooling, per month, is $47/month.  This assumes the electricity is all coming from the grid, with no solar PV contribution.  This is down quite a bit from last year's 2011 average of $62 because Winter low temps and Summer high temps this year have not been as extreme as last year.  And, a grant was obtained to add attic insulation recently.

If you're looking for kWh consumption for heating & cooling, using geo, it's currently at 520 kWh/mo, or about 17 kWh per day.  I don't have a chart showing this.  Again, this is down quite a bit from last year.

Lastly, if you're looking for analysis of heating & cooling cost, using geo, indexed to make it an apples to apples comparison regardless of weather, climate, area lived, and/or size of structure, there's a Structure Energy Efficiency Performance chart at the same URL noted above.  For 2011, the structure's energy efficiency performance for cooling was 7.0 BTU/CDD/SF, and for heating was 2.4 BTU/HDD/SF.  For 2012, these numbers will be improved, due to taking advantage of a govt grant that added insulation to the structure.

Hope this helps.

Best regards,

Bill

FWIW, another data point, but without nearly as many bells and whistles as Bill...

Our 3400 SF ICF / Sprayfoamed attic home completed in 2008 has a base load of about 7500 kWh / year and an annual heating / cooling usage of 3000 kWh for a total cost, in 2011, of $1200. Loads include well and septic pumps (in lieu of water and sewer utility charges)

The house is near Jax, FL, has a single Waterfurnace Envision 3 ton package unit fed with open loop artesian well water, EWT 71. Heating setpoint is 71 Cooling setpoint 77. House leaks 1600 CFM 50; about 3.5 ACH 50...good but nothing spectacular.

Hope that helps