The good news just keeps coming. This month's bill came in at 771 kW over 32 days or 24.1 kWh/d. That's ~35% under last year's bill of 37 kWh/d. That's to be expected since we've averaged 35% under for the past 5 months. Compared to our former townhome, we're 4% over. Can't complain...overall itsFantastic!
I expected the next couple months to not be as great because we're moving into Fall and the HVAC system will most likely not turn on at all. There have been some cold nights recently with my wife turning on the heat a couple of mornings (Brrr).
I've graphed my energy usage since 2009 below. Some things to note:
Jan 2009 - March 2010 we were still in our 2005, 1300 sf townhome.
Then in April 2010, we moved into our current home (1984, 2700sf).
Finally, in April 2011, we installed the geothermal heat pump.
The energy savings is fairly obvious (green bars starting in April, month 4). What's pretty cool is that you can see how efficient our home is compared to our previous townhome which was newer (2005) and less than half the size (red bars). Neat-o, huh?
Now I need to anticipate what Winter's going to bring. Supposedly, the geothermal system is significantly more efficient in heating mode than cooling mode. It's said that its somewhere around 67-80% more efficient. Only time will tell...
