We had a closed loop GeoThermal system installed. It cost $10k more than traditional system, we should see
payback within 7 years. Our home is 100% electric, we have two seperate meters, the graph below shows each meter usage (Geo
meter includes the dual hot water heater).
Summer a/c cost is very efficient as seen from the graph, residential electric
service includes year-around usage of our outdoor 450 gallon 7-person hot tub.
The hot water system reclaims waste heat from the HVAC liquid heat pump. Cold well water (58-ish degrees)
is step-up to about 85 degrees via heat exchanger on the HVAC unit. That is stored in the first 50 gallon tank. The second
50 gallon tank is the actual daily usage hot water heater, there the warm water from the first tank is heated for daily usage.
We have never ran out of hot water, but if we had lots of people taking showers/etc I could turn on the first tank and then
have 100 gallons of hot water.
