I’m looking for some perspective on the electricity consumption and costs of a new geothermal system that has been operating for the last six months. The good news is that the system kept our home warm for through the winter, but the electricity costs are significantly higher than what we were previously paying to heat our home with natural gas. Here’s the situation * Home is in Western NY with approx 3600 sqft on two finished floors. Basement is unfinished. * Last winter (’11-’12), the home was heated by two 95% efficient gas furnaces with variable speed air handlers * 6ton Advanced Geothermal Technologies DX system was installed last Fall, and was operational for this winter * In January, I realized that our gas & electric bills were much higher than last winter and saw that our household electricity usage had increased 2500-3000 kWh per month compared to the prior year. (Gas usage was much lower than last winter, and nearly flat from the summer – which is what we expected.) * We then installed a separate meter to track the heatpump (and desuperheater) electricity usage so we can isolate from other household consumption. * When I do the math of heating cost and adjust for HDDs to get a cost per HDD, I find that the costs of the heating with the geothermal system are ~60% higher than they were with natural gas. (This is based on the current natural gas costs. If I use last year’s gas price which was higher, the geothermal costs are still 45% higher than gas when I adjust for HDDs.) Needless to say, this is concerning because we made a very large investment in a system with the expectation that it would save us 50%+ on energy bills each year, and right now it looks like we’re paying more each month and would be better off just running the gas furnaces. My take is that one of three things is happening: 1) Something about the system isn’t operating correctly, and it’s leading to much higher than normal energy consumption to run the system. This was my first instinct, and also hope, since that would imply that it could be fixed and we’d be back on the path of saving energy/money. However, the system seems to be cycling on/off at reasonable intervals – when it runs, it’s typically for a relatively short period. Not sure what else could be wrong. 2) Something about the particular system design/size/configuration isn’t right for the situation – e.g., is system/compressor is larger than needed, and therefore consumes extra energy? Not sure what system/design choices could lead to big increases in energy consumption without additional symptom of system running excessively. 3) Or, perhaps the high efficiency furnaces were already providing heat at very low cost, and a geothermal system shouldn’t be expected to perform at even lower costs – in other words, investing in geothermal was a bad idea in our case where the baseline heating costs were already low. I can provide more details of the system and measurement/calculations if necessary, but I’m thinking folks here may have a good general sense of what kind of energy/cost savings would be expected when moving from natural gas to geothermal. This experience has been disheartening – I’d been aware of geothermal systems for a while and was excited to have the opportunity to install at my home. I was looking forward to have a positive story to share with other and maybe win more converts. However, at this point I’m starting to feel that this was a big waste of money, but hopefully that’s wrong and someone can help me figure out what’s going on. Thanks in advance for any thoughts or advice for next steps in diagnosing or fixing.