Luxaire furnaces are considered energy-efficient as of 2015. The energy efficiency of any furnace depends on variables including make and model, size of home and quality of installation.
Luxaire heating and cooling systems are energy-efficient, and many Luxaire products are ENERGY STAR certified. In order to be ENERGY STAR certified, the product must be at least 15 percent more efficient than standard products. Luxaire furnaces typically have annual fuel utilization efficiency ratings between 95 and 98, according to the ENERGY STAR website.
According to Amazon reviewers, Luxaire heating and cooling systems are efficient and beneficial as long as they are installed properly. Finding a good installation technician is extremely important when dealing with furnace installation and efficiency.