This work describes the development of a hybrid junior-level 4-credit-hour heat and mass transfer course. The lecture portion of the course was developed as approximately 80% online. The students and instructor met in person for the lecture portion of the course once every other week for 50 minutes, with the remaining activities completed online. The laboratory portion of the course remained in the traditional face-to-face format. Specifications grading was used to determine final course grades. This paper will describe the course structure, types of assignments, and use of face-to-face class time. Student performance in the hybrid course is compared to previous student performance in the same course taught in a face-to-face format. Student feedback and instructor observations are shared.