Need to replace a cast iron radiator? Watch this first

Accurately calculating the BTU output of cast iron radiators is essential for modern boiler sizing, replacing damaged units, or compensating for increased heat loss in renovated rooms. Determining the total radiation load involves measuring the height, width, and number of columns for each radiator section to find its Equivalent Direct Radiation (EDR) value, which is then multiplied by the total number of sections and adjusted based on operating water temperatures. To account for heat loss in older piping systems, the final boiler capacity should typically exceed the calculated radiation load by 20-25%. Beyond sizing, maintaining system efficiency requires chemical cleaning and flushing to remove debris before installing new equipment. Utilizing tools like magnetic strainers and high-power flush carts ensures that the new boiler operates within a clean environment, preventing premature wear and optimizing energy consumption.