A feat not easily accomplished with two separate bulky heating and cooling systems. We note with several monitored commercial buildings of 60,000 - 80,000 sq. GeoExchange systems provide substantially higher comfort opportunities and building and room by room flexibility. The relative costs of operating a geo-source heat pump both the costs of fuels and the cost of periodic and repair maintenance must be considered. Below is an estimate of these factors and their effect on a ten-year cash flow.
Cash flows can be variable on the basis of the input assumptions.
The assumptions are well founded, and we'd be pleased to change any input to this simple model and provide modified results. Table below and its model shows an example of a substantial operational cash flow advantage by the use of the geo-source heat pump. The reliability and maintenance costs of the geothermal heat pump have been the subject of several recent factual studies. The overall life of a geothermal heat pump has been evaluated in a U.S. Department of Energy 4 funded report in 1988. GeoExchange maintenance costs are even more impressive with several sites closely monitored.