Earth To Air Systems
Earth To Air products

ETA Stainless Steel Geothermal Heat Pump Units

ETA state-of-the-art geothermal technologies provide unrivaled advantages to end-users. Aside from its excpetional efficiency ratings, ETA technologies can be installed with up to 50% less surface area and excavation than conventional watersource geothermal technologies. The material difference in excavation requirements translates into lower installation costs and faster paybacks for those who elect to utilize ETA geothermal heating and cooling technologies.


Ultimate Efficiencies. Exceptional Comfort Level.

  • Highest known operational efficiencies - Lowest possible operational costs.
  • Year round heating and cooling, simply controlled by a thermostat
  • Typically cuts conventional heating/cooling operating costs 40% to 80%
  • Certified Test Results of 3.6 to 5.8 COP in Heating and 16 to 28.5 EER in Cooling
  • Qualifies for all known high-efficiency rebate programs in the USA
  • Exceeds US Department of Energy high efficiency standards
  • Ultimate Humidity Removal providing extremely high level of comfort
  • Minimal surface area space requirements
  • No unsightly and noisy outdoor units
  • Low maintenance/service requirements
  • Designer stainless steel exterior
  • Safety tested pursuant to UL 1995
  • Efficiency tested pursuant to ARI standard 870
  • Certified for Canadian application pursuant to CAN/CSA STD 222.2 No. 236
  • Approved for indoor and outdoor use
  • Models available in both 60 and 50 HZ

ETA's Ground Source Heat Exchanger

ETA uses a copper-based ground source heat exchanger (GSHE). ETA has pioneered the use of copper-based GSHE at depths in excess of 100 feet.

Ground Source Heat Exchange
Model Number TS18 TS24 TS27 TS30 TS36 TS42 TS48 TS54 TS60
Capacity (BTU) 18,000 24,000 27,000 30,000 36,000 42,000 48,000 54,000 60,000
Approximate Weight 182 188 189 191 195 200 218 224 235
Electrical 50/60 HZ Single Phase
Refrigerant/Oil R-410A Refrigerant/Polyester Compressor Lubricant Oil
Efficiencies Heating COP: 3.6 - 5.8 / Cooling: 16 to 28.5 EER