Some models of Heil air conditioners are extremely efficient, potentially leading to substantial savings in the long run on energy bills. In addition, some models of Heil air conditioner may qualify for tax credits due to their high energy efficiency ratings.
Heil central air conditioners in production as of 2015 can achieve Seasonal Energy Efficiency Ratios of up to 19, while Heil's mini-split air conditioning designs can achieve up to 22 SEER. The Department of Energy estimates that high-efficiency air conditioners like these models use up to 15 percent less energy than other models. Energy savings can be as high as 30 percent if the unit is replacing an air conditioner more than 12 years old.