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Retrofitting or installing with new home construction – Installing geothermal in coordination with laying new foundations is 20% to 40% cheaper than retrofits. The installation cost is the biggest expense and depends on various home and property conditions: Geothermal heat pump unit prices make up only 20% to 40% of the total system cost. In some cities, discharge permit fees for pumping into ponds cost $2,500 to $10,000 annually, depending on the system size. Many building codes and regulations apply for open loops with groundwater discharge. Prone to mineral and sediment buildup and require more maintenance than closed-loop systems Requires an ample supply of clean water nearby After circulation, the water either returns to the same well, a separate recharge well, or back to the pond. Open-loop systems circulate well, pond, or river water as the heat-exchange fluid through the geothermal heat pump. Open-loop geothermal systems cost $10,000 to $28,000 installed. Geothermal pond closed-loop system installation Open-loop geothermal system cost Pond’s surface area must be 0.3 to 1.0 acre across or 14,500 to 43,500 square feet minimumĬoils stay submerged 8’ to 12’ deep to prevent freezing Requires no extensive drilling or trenching More energy-efficient than other ground loop systems Pros and consĬheapest installation costs of all geothermal systems Submerged loops require a nearby water source to transfer the water's natural heat to the home through underground pipes. Vertical drilling takes 1 to 2 days on averageĬosts more to install due to the required drill rig and grout machineĪ geothermal pond closed-loop system costs $10,000 to $32,000 installed, depending on the size and pond location. Requires less piping than horizontal systems Minimizes disturbance to existing landscape Vertical loops are ideal for homes with limited backyard space and rocky soil conditions. Horizontal geothermal ground loop system with a slinky design Vertical geothermal costĪ closed-loop vertical geothermal system costs $20,000 to $38,000 installed. Horizontal hole drilling prevents full-yard excavationĬomes in straight pipes or overlapping slinky designĪ slinky-coil design allows more pipe to fit in shorter trenches, but only works in highly conductive soil and overheats in hot climates. Ideal for new constructions on large plots Most homes need 0.25 to 0.75 acres of land for the trenches. The pipe length depends on the climate, soil temperature, and moisture content. Contractors install multiple horizontal loops 4’ to 10’ deep in rows 100’ to 400’ long. Horizontal loops are more cost-effective but need large yards.Ī horizontal closed-loop geothermal system costs $15,000 to $34,000 installed. Open-loop systems are submerged pipes circulating well, lake, or pond water. Geothermal heat pumps by system typeīoth open and closed geothermal loops have underground lines circulating water, refrigerant, or antifreeze to transfer heat.Ĭlosed-loop ground source heat pump systems account for 85% of installations and include horizontal-in-ground, vertical-in-ground, or water-submerged types. Geothermal heat pump prices comparison System type Geothermal heating installation cost - chart Geothermal heating costs $4,000 to $8,000 per ton on average, with prices ranging from $2,200 to $12,000 per ton, depending on the system type and site-specific work. A standard heat pump lasts 10 to 15 years. Geothermal systems last 20 to 25 years for the indoor heat pump and 40 to 60 years for the ground loops. In comparison, a standard heat pump installation costs $3,800 to $8,200 installed and has higher operating costs. Geothermal HVAC reduces utility bills and uses 25% to 65% less energy and electricity than conventional systems. The geothermal energy tax credit allows homeowners to claim 30% of the total cost from their federal taxes for systems installed before December 31, 2032. Geothermal systems provide both heating and air conditioning using renewable energy from the constant temperature below the surface.įossil fuel-produced electricity is only necessary to run the fan and circulation pump. Key facts for geothermal heat pumps (GHP) and ground source heat pumps (GSHP): *Based on 24 project costs reported by HomeGuide members. Geothermal heat pump cost National average cost
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