Example image of eyePlorer eyePlorer map for 'Seasonal energy efficiency ratio': British thermal unit Watt Coefficient of performance Thermodynamics Laws of thermodynamics Carnot cycle Kelvin Rankine scale Thermodynamic temperature Annual fuel utilization efficiency NORDYNE Inverter (air conditioning) Heat pump EER Seer Thermal efficiency Air source heat pumps List of energy abbreviations Solar air conditioning Zero-energy building HVAC Air conditioner Geothermal heat pump Metrication in the United States