This article explores the essential role of thermography in modern product testing, with a particular focus on evaluating the performance and energy efficiency of heating products. It highlights how thermographic imaging helps identify design flaws, heat loss, and malfunctioning components in a non-invasive way. Additionally, it explains why understanding and accurately setting emissivity values is critical for quantitative thermography applications. Whether you're in R&D or quality assurance, this guide provides valuable insights into improving product reliability and thermal performance.