Not all EC motors are compatible with hydrocarbon refrigerants. Unada offers "HC compatible" versions of our UC refrigeration fan motors. Per UL requirements, these are “non-sparking,” and approved for use with hydrocarbon refrigerant charges up to 150gm. We also offer ATEX certified (EEx nA IIA T5) versions of UC motors for more safety-critical applications. For help selecting the best motor for your hydrocarbon application, please contact us.