Geothermal heat pumps have energy efficiency. Even better, they can help you save money. They routinely surpass 100% operating efficiency compared to traditional electric systems. They are unaffected by wind, rain and other weather factors, which results in fewer repairs. The 30% Federal Renewable Energy Tax Rebate lets you deduct up to 30% of the cost of installation. Also, they use less electricity, lowering your electric bill and producing fewer carbon emissions.