Proper diffuser selection is essential for comfortable and efficient air distribution. This guide explains how to use throw, drop and spread to determine suitable diffuser sizes, airflow patterns and locations while controlling drafts, noise and pressure loss. It also includes practical calculations, catalogue guidance and a worked office example.

Air-cooled chillers reject heat directly to ambient air using condenser fans, making them simpler and easier to install. Water-cooled chillers transfer heat through condenser water to a cooling tower, achieving higher efficiency for large-scale applications. The right choice depends on project size, climate, and long-term energy cost.