Why Use Economiser in Boiler: Boost Efficiency & Cut Costs

An economiser in a boiler is a heat exchanger device that preheats feedwater using waste flue gases, significantly improving thermal efficiency and reducing fuel consumption. By recovering heat that would otherwise be lost, economisers can enhance boiler efficiency by 5–15%, leading to substantial cost savings and lower carbon emissions.

Industrial boilers without economisers waste 15–30% of energy through exhaust gases, but integrating an economiser can capture this heat, reducing fuel costs by up to 10%. Studies show that for every 22°C (40°F) rise in feedwater temperature, boiler efficiency improves by 1%. Economisers also help meet stringent environmental regulations by cutting CO₂ emissions. For example, a 10% efficiency gain in a 100,000 lb/hr boiler can save over $100,000 annually in fuel costs. Additionally, economisers extend boiler lifespan by reducing thermal stress. Leading manufacturers like Cleaver-Brooks and Thermax report that economisers pay for themselves within 1–3 years through energy savings. With rising fuel prices, investing in an economiser is a smart, sustainable choice for industries relying on steam generation.