Table 3.3. Average Cooling Efficiency for Geothermal Heat Pump Shipments, 2006
(Average EER)
Model Type
2006
ARI-320
12.9
ARI-325/330
19.3
Other (Non-ARI Rated)
13.1
EER=Energy Efficiency Ratio Note: One ton of capacity is equal to 12,000 Btus per hour. Efficiency is expressed as btus of output per watthours of input. The higher the EER the more efficient the unit is. Source: Energy Information Administration, Form EIA-902, "Annual Geothermal Heat Pump Manufacturers Survey."