Trane's XB13 home air-conditioning models have a Seasonal Energy Efficiency Ratio of up to 14.5. These units are also ENERGY STAR compliant, which means they have an energy-saving mode that automatically adjusts the unit's thermostat to save energy.
Trane's XR13 home air-conditioning units are some of the more affordable energy-efficient units that Trane offers. Though they are slightly less efficient than other models, such as the XR15 and XB16, they are still designed to reduce overall heating and cooling costs. As of 2015, there are seven air-conditioning units in Trane's XR13 series. These units vary in cooling capacity, weight and dimensions.