Evaluation of Developed Defrost System Electrical Learning Materials for Competency-based HVAC Instruction

This study evaluated the quality and acceptability of developed defrost system electrical learning materials for competency-based HVAC instruction at the Palompon Institute of Technology. A descriptive-evaluative research design was employed using responses from Industrial Technology students and subject matter experts (SMEs). The materials were assessed in terms of content accuracy, clarity and organization, usability and presentation, and instructional effectiveness. Results revealed that the learning materials obtained an overall excellent rating, while the evaluation instrument demonstrated excellent reliability (α = 0.91). Statistical analyses using the independent samples t-test and Mann–Whitney U test showed no significant difference between the evaluations of students and SMEs, with a small effect size indicating practically negligible differences. The findings confirm that the developed learning materials are pedagogically effective, technically sound, and suitable for implementation in HVAC education and training programs.