How Radiators Work - Heating System Diagram & Explanation #228575 (License: Personal Use)

This line-art diagram depicts a classic cast-iron radiator with vertical fins and side valves, emitting wavy lines to represent rising heat via convection. The design highlights the core principle of hydronic or steam-based space heating-thermal energy transfer from hot water or steam through metal surfaces into the surrounding air. Such visuals are commonly used in HVAC guides, educational materials, and home maintenance resources.

Used on HVAC educational pages, home improvement blogs, or technical manuals to explain central heating operation; matches user intent seeking basic understanding of radiator function or troubleshooting heating issues.